Gweld cod am Sir Fynwy (etholaeth seneddol)

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{{Pethau
| image = Monmouthshire2024Constituency.svg
| fetchwikidata = ALL}}

Mae etholaeth '''Sir Fynwy''' yn ethol aelod i senedd [[Tŷ'r Cyffredin (Y Deyrnas Unedig)|San Steffan]]. Fe'i sefydlwyd yn [[1536]], diddymwyd yn [[1885]] ac ailsefydlwyd yn [[2024]]. 

Crëwyd Etholaeth Sir Fynwy o dan [[Deddf Uno 1536|Ddeddf Uno 1536]] gan ddychwelyd ei  ASau gyntaf ym 1542. Roedd yr etholaeth yn cynnwys sir hanesyddol [[Sir Fynwy]] ac yn dychwelyd dau Aelod Seneddol i Dŷ'r Cyffredin. Cyn diwygio’r etholfraint ym 1832 roedd yr etholaeth ''ym mhoced''  teuluoedd Morgan, [[Tŷ Tredegar]] a theulu Somerset.

==Ffiniau a wardiau==
Mae'r holl wardiau o fewn Sir Fynwy ac yn cynnwys:

* [[Brynbuga]], [[Cas-gwent]], [[Cil-y-coed]], [[Y Fenni]], [[Trefynwy]], [[Aber-ffrwd, Sir Fynwy|Aber-ffrwd]], [[Abergwenffrwd]], [[Betws Newydd]], [[Bryngwyn, Sir Fynwy|Bryngwyn]], [[Caer-went]], [[Castellnewydd, Sir Fynwy|Castellnewydd]], [[Cemais Comawndwr]], [[Cilgwrrwg]], [[Clydach, Sir Fynwy|Clydach]], [[Coed Morgan]], [[Coed-y-mynach]], [[Cwmcarfan]], [[Cwm-iou]], [[Drenewydd Gelli-farch]], [[Y Dyfawden]], [[Yr Eglwys Newydd ar y Cefn]],  [[Gaer-lwyd]], [[Gilwern]], [[Glasgoed, Sir Fynwy|Glasgoed]], [[Goetre, Sir Fynwy|Goetre]], [[Gofilon]], [[Y Grysmwnt]], [[Gwehelog]], [[Gwernesni]], [[Gwndy]], [[Hengastell]], [[Little Mill]], [[Llanarfan]], [[Llan-arth, Sir Fynwy|Llan-arth]], [[Llanbadog]], [[Llancaeo]], [[Llandegfedd]], [[Llandeilo Bertholau]], [[Llandeilo Gresynni]], [[Llandenni]], [[Llandidiwg]], [[Llandogo]], [[Llanddewi Nant Hodni]], [[Llanddewi Rhydderch]], [[Llanddewi Ysgyryd]], [[Llanddingad]], [[Llanddinol]], [[Llanelen]], [[Llanelli, Sir Fynwy|Llanelli]], [[Llanfable]], [[Llanfaenor]], [[Llanfair Cilgedin]], [[Llanfair Is Coed]], [[Llanfihangel Crucornau]], [[Llanfihangel Gobion]], [[Llanfihangel Tor-y-mynydd]], [[Llanfihangel Troddi]], [[Llanfihangel Ystum Llywern]], [[Llanfocha]], [[Llan-ffwyst]], [[Llangatwg Feibion Afel]], [[Llangatwg Lingoed]], [[Llangiwa]], [[Llangofen]], [[Llan-gwm]], [[Llangybi, Sir Fynwy|Llangybi]], [[Llanhenwg]], [[Llanisien, Sir Fynwy|Llanisien]], [[Llanllywel]], [[Llanofer]], [[Llanoronwy]], [[Llan-soe]], [[Llantrisant, Sir Fynwy|Llantrisant]], [[Llanwarw]], [[Llanwenarth]], [[Llanwynell]], [[Llanwytherin]], [[Y Maerdy, Sir Fynwy|Y Maerdy]], [[Magwyr]], [[Mamheilad]], [[Matharn]], [[Mounton]], [[Nant-y-deri]], [[Newbridge-on-Usk]], [[Y Pandy]], [[Pen-allt]], [[Penrhos, Sir Fynwy|Penrhos]], [[Pen-y-clawdd]], [[Porth Sgiwed]], [[Pwllmeurig]], [[Rogiet]],  [[Rhaglan]], [[Sudbrook, Sir Fynwy|Sudbrook]], [[Tre'r-gaer]], [[Tryleg]], [[Tyndyrn]] ac [[Ynysgynwraidd]].

==Aelodau seneddol==
===1542–1653===

{| class="wikitable"
|-
!Blwyddyn!!Aelod Cyntaf!!Ail Aelod
|-
| 1542|| colspan = "2"|Anhysbys''
|-
| 1545|| Walter Herbert|| Charles Herbert <ref name = HoP>{{cite web| url = http://www.historyofparliameentonline.org/volume/1509-1558/constituencies/monmouthshire| title = History of Parliament| accessdate = 13 Rhag 2014}}{{Dolen marw|date=February 2021 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
|-
| 1547|| [[Thomas Morgan (AS bu farw 1565)|Syr Thomas Morgan]] || William Herbert <ref name= HoP/>
|-som
| 1553 (Hydref)|| Syr Charles Herbert || Thomas Somerset <ref name= HoP/>
|-
| 1554 (Ebrill)|| Thomas Herbert|| James Gunter <ref name= HoP/>
|-
| 1554 (Tach)|| Thomas Somerset|| David Lewis <ref name= HoP/>
|- (bu farw 1582)|William Morgan]] <ref name= HoP/>
|-
| 1558 ||[[Henry Somerset, Ail Iarll Worcester|Francis Somerset]]|| [[William Morgan (bu farw 1582)|William Morgan]]  <ref name= HoP/>
|-
| 1559 (Ion)|| [[William Morgan (bu farw 1569)|William Morgan I]]|| [[Thomas Herbert (AS Sir Fynwy)|Thomas Herbert]] <ref name = HoP2>{{cite web | url = http://www.historyofparliamentonline.org/volume/1558-1603/constituencies/monmouthshire | title= History of Parliament| accessdate = 13 Rhag 2014}}</ref>
|-
| 1562–1563|| [[Matthew Herbert (bu farw 1603)|Matthew Herbert]]|| [[George Herbert (AS Sir Fynwy)|George Herbert]] <ref name= HoP2/>
|-
| 1571|| [[Charles Somerset (AS Sir Fynwy)|Charles Somerset]]|| [[William Morgan (bu farw 1582)|William Morgan]] <ref name= HoP2/>
|-
| 1572 (Mai)|| [[Charles Somerset (AS Sir Fynwy)|Charles Somerset]]|| [[Henry Herbert (AS Sir Fynwy)|Henry Herbert]]<ref name= HoP2/>
|-
| 1584 (Medi)|| [[William Herbert (AS bu farw 1593)|Syr William Herbert]]|| [[Edward Morgan (AS Sir Fynwy)|Edward Morgan]] <ref name= HoP2/>
|-
| 1586 (Medi)|| [[William Herbert (AS bu farw 1593)|Syr William Herbert]]|| [[Edward Morgan (AS Sir Fynwy)|Edward Morgan]] <ref name= HoP2/>
|-
| 1588 (Hydref)|| [[Thomas Morgan (AS bu farw 1603)|Thomas Morgan II]]|| [[William John Proger]] <ref name= HoP2/>
|-
| 1593|| |Syr William Herbert ''(bu farw yn y swydd, 1593)''|| Edward Kemeys <ref name= HoP2/>
|-
| 1597 (Medi)|| Henry Herbert|| John Arnold <ref name= HoP2/>
|-
| 1601 (Hydref)|| Thomas Somerset|| [[Henry Morgan (o Landaff)|Henry Morgan]] <ref name= HoP2/>
|-
| 1604 ||[[Thomas Somerset, Ardalydd 1afSomerset|Thomas Somerset]] ||  [[John Herbert (Ysgrifennydd Gwladol)|Syr John Herbert]]	
|-
| 1614 || [[Walter Montagu (AS)|Walter Montagu]]  ||  [[William Jones (o Dreowen)|William Jones]]
|-
| 1621 || [[Edmund Morgan (o Landaf)|Syr Edmund Morgan]] ||    [[Charles Williams (o Langybi)|Charles Williams]]
|-
| 1624 || [[Robert Sidney, Ail Iarll Leicester|Robert Viscount Lisle]] || [[William Morgan (o Dredegar)|Syr William Morgan]]
|-
| 1625 || [[Robert Sidney, Ail Iarll Leicester|Robert Viscount Lisle]] || [[William Morgan (o Dredegar)|Syr William Morgan]]
|-
| 1626 || [[Nicholas Arnold (AS)|Nicholas Arnold]] ||  [[William Herbert (o Coldbrook)|William Herbert]]
|-
| 1628|| [[Nicholas Arnold (AS)|Nicholas Arnold]] ||  [[Nicholas Kemeys]]
|-
| 1629–1640 ||colspan = "2"|''Senedd heb ei alw''
|-
| Ebrill 1640 || [[William Morgan (o Rymni)|William Morgan]] ||   [[Walter Rumsey]]
|-
| Tachwedd 1640 || [[Charles Williams (o Langybi)|Syr Charles Williams]] <br> ''amnydwyd  1642 gan'' [[Henry Herbert (Seneddwr)|Henry Herbert]] ||   [[William Herbert (bu farw 1645)|William Herbert]], ''cau allan 1644''
|-
|1645 || [[John Herbert (bu farw 1659)|John Herbert]] ||  [[Henry Herbert (Seneddwr)|Henry Herbert]]
|-
|1648|| [[John Herbert (bu farw 1659)|John Herbert]] ||  [[Henry Herbert (Seneddwr)|Henry Herbert]]
|-
|1653 || [[Philip Jones o Fonmon|Philip Jones]] ||
|-
|}

===1654-1660===
Rhwng 1654 a 1660, bu tri aelod yn cynrychioli'r sir. 
{| class="wikitable"
|-
!Blwyddyn!!Aelod Cyntaf!!Ail Aelod!!Trydydd Aelod
|-
|1654 || [[Richard Cromwell]], ''Safodd dros Hampshire <br>amnydwyd gan '' [[Thomas Morgan (o Fachen)|Thomas Morgan]] || [[Philip Jones o Fonmon|Philip Jones]] ''Safodd dros Forgannwg  <br> amnydwyd gan '' [[Thomas Hughes (AS)|Thomas Hughes]]  || [[Henry Herbert (Seneddwr)|Henry Herbert]]
|-
|1656 || [[James Berry (Major-General)|Major General James Berry]], ''Safodd dros Swydd Gaerwrangon <br> amnydwyd gan'' [[Nathaniel Waterhouse]]  ||  [[John Nicholas (o Gas-gwent)|John Nicholas]] ||  [[Edward Herbert (o the Grange)|Edward Herbert]]
|-
| 1659 || [[William Morgan (o Fachen a Thredegar)|William Morgan]]  ||  [[John Nicholas (o Gas-gwent)|John Nicholas]]||
|-
|}

===1660-1831===

{| class="wikitable"
! Blwyddyn !! !! Aelod !! Plaid !! !! Aelod!! Plaid
|-
| 1660 || rowspan="2" |
| rowspan="2" | Henry Somerset || rowspan="2" |
| 
| rowspan="5" |William Morgan || rowspan="5" |
|-
| 1661
|-
| 1667 || }" |
|Syr Trevor Williams,||    <!-- c 1623    Nov 1692 -->
|-
| 1679 ||  |
| Charles Somerset||<!-- party -->
|-
| 1679|| rowspan="3" }" |
| rowspan="3" |Syr Trevor Williams || rowspan="3" |
|-
| 1680 || rowspan="2"  |
| rowspan="2" | Syr Edward Morgan || rowspan="2" | <!-- party -->
|-
| 1681
|-
| 1685 ||rowspan="3"   |
|rowspan="3" |Charles Somerset, Ardalydd Caerwrangon||rowspan="3" |<!-- party -->
| |
|Syr Charles Kemeys ||<!-- party --> <!-- 18 May 1651 22 Dec 1702 -->
|-
| 1689) ||
|Syr Trevor Williams|| 
|-
|  1690 || rowspan="4"  |
| rowspan="4" | Thomas Morgan || rowspan="4" | <!-- party --> <!-- to 1701 -->
|-
| 1695 ||  |
| Syr Charles Kemeys|| <!-- party -->
|-
| 1698 || rowspan="3"  |
| rowspan="3" |Syr John Williams || rowspan="3" |<!-- party -->  <!--to 1705  -->
|-
| 1700
|-
| 1701 ||rowspan="8" }" |
|rowspan="8" |John Morgan || rowspan="8" |  <!-- party --> <!-- (to 1720) -->
|-
| 1705||  |
| Syr Hopton Williams||<!-- party -->
|-
| 1708 ||rowspan="2"  |
| rowspan="2" | Thomas Windsor|| rowspan="2" | <!-- party -->
|-
| 1710
|-
| 1712 ||  |
| James Gunter||<!-- party -->
|-
| 1713 ||  |
|Thomas Lewis||<!-- party -->
|-
| Medi 1713 ||  |
|Syr Charles Kemeys||<!-- party -->
|-
| 1715 ||rowspan="2"  |
|rowspan="2" |Thomas Lewis||rowspan="2" |<!-- party -->
|-
| 1720 ||rowspan="5" }" |
| rowspan="5" | John Hanbury || rowspan="5" | <!-- (to 1735) -->
|-
| 1722 ||rowspan="2" }" |
| rowspan="2" | William Morgan|| rowspan="2" | 
|-
| 1727
|-
| 1731 ||  |
| Yr Arglwydd Charles Somerset || <!-- party -->
|-
| 1734 || rowspan="3"  |
| rowspan="3" |Thomas Morgan|| rowspan="3" |<!-- party -->
|-
| 1735 || rowspan="2"  |
| rowspan="2" | Charles Hanbury Williams || rowspan="2" | <!-- party -->
|-
| 1741
|-
| 1747 || rowspan="3" }" |
| rowspan="3" | William Morgan || rowspan="3" | 
| rowspan="4"  |
| rowspan="4" | Capel Hanbury|| rowspan="4" |<!-- party --> <!-- (to 1766) of Pontypool -->
|-
| 1754
|-
| 1761
|-
| 1763 || rowspan="3"  |
| rowspan="3" |Thomas Morgan|| rowspan="3" |<!-- party -->
|-
| 1766 ||rowspan="5" }" |
| rowspan="5" |John Hanbury ||rowspan="5" | 
|-
| 1768
|-
| 1771 || rowspan="6"  |
| rowspan="6" |John Morgan|| rowspan="6" |<!-- party -->
|-
| 1774
|-
| 1780
|-
| 1784||  |
|Henry Nevill||<!-- party -->
|-
| 1785 || rowspan="5"  |
| rowspan="5" | James Rooke || rowspan="5" |<!-- party --> <!-- to 1805 -->
|-
| 1790
|-
| 1792 ||  |
|Syr Robert Salusbury||<!-- party -->
|-
| 1796 || rowspan="11"  |
| rowspan="11" | Syr Charles Gould Morgan || rowspan="11" |<!-- party -->
|-
| 1802
|-
| 1805 || rowspan="4"  |
| rowspan="4" | Arthur John Henry Somerset || rowspan="4" | <!-- party --> 
|-
| 1806
|-
| 1807
|-
| 1812
|-
| 1816 || rowspan="6" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="6" |[[Granville Charles Henry Somerset|Yr Arglwydd Granville Somerset]] || rowspan="6" | [[Y Blaid Geidwadol (DU)|Ceidwadol]] <!-- party --> 
|-
| 1818
|-
|1820
|-
| 1826
|-
|1830
|-
| 1831 || rowspan="4" }" |
| rowspan="4" | [[William Addams-Williams]] || rowspan="1" |  <!-- 1787  5 Sep 1861 -->
|-

|}

===1832-1885===

{| class="wikitable"
! Blwyddyn !! !! Aelod !! Plaid !! !! Aelod!! Plaid
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1832|1832]]||
| rowspan="3" | [[William Addams-Williams]] || rowspan="3" |  <!-- 1787  5 Sep 1861 -->
| rowspan="5" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="5" |[[Granville Charles Henry Somerset|Yr Arglwydd Granville Somerset]] || rowspan="5" | [[Y Blaid Geidwadol (DU)|Ceidwadol]] <!-- party --> 
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1835|1835]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1837|1837]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1841|1841]] || rowspan="9" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="9" |[[Charles Octavius Swinnerton Morgan]] || rowspan="9" | [[Y Blaid Geidwadol (DU)|Ceidwadol]] <!-- party-->
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1847|1847]]
|-
| [[Isetholiad 1848|1848]] || rowspan="3" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="3" | [[Edward Arthur Somerset]] || rowspan="3" | [[Y Blaid Geidwadol (DU)|Ceidwadol]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1852|1852]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1857|1857]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1859|1859]] || rowspan="3"  |
| rowspan="3" | [[Poulett George Henry Somerset]] || rowspan="3" | <!-- party --> 
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1865|1865]]
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1868|1868]]
|-
| |1871 || rowspan="2" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="2" |[[Arglwydd Henry Somerset|Yr Arglwydd Henry Somerset]] || rowspan="2" | [[Y Blaid Geidwadol (DU)|Ceidwadol]] <!-- party -->
|-
| 1874 || rowspan="2" style="background-color: {{Conservative Party (UK)/meta/color}}" |
| rowspan="2" |[[Frederick Courtenay Morgan|Col Frederick Morgan]] || rowspan="2" |  <!-- party -->
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1880|1880]] ||  |
|[[John Allan Rolls, Barwn 1af Llangatwg|John Rolls]]||<!-- party -->
|-
| [[Etholiad cyffredinol y Deyrnas Unedig, 1885|1885]] || colspan="6"| ''diddymu'r etholaeth''
|}
=== Aelodau ers 2024 ===

''[[Mynwy (etholaeth seneddol)|Mynwy]] a [[Dwyrain Casnewydd (etholaeth seneddol)|Dwyrain Casnewydd]] hyd 2024''

{| class="wikitable"
|-
!colspan="2"|Etholiad!!Aelod
!Plaid
|-
|style="background-color: {{Labour Party (UK)/meta/color}}" |
| [[2024 United Kingdom general election|2024]]
| [[Catherine Fookes]]
| [[Y Blaid Lafur (DU)|Llafur]]
|}

==Etholiadau==
===Etholiadau yn y 2020au ===
{{Election box begin|title=[[Etholiad cyffredinol y Deyrnas Unedig, 2024|Etholiad cyffredinol 2024]]: Sir Fynwy<ref>[https://www.bbc.co.uk/cymrufyw/etholiad/2024/du/etholaethau/W07000101 BBC Cymru Fyw Canlyniadau Sir Fynwy] adalwyd 5 Gorff 2024</ref>
}}
{{Election box candidate with party link|
  |party      = Welsh Labour
  |candidate  = [[Catherine Fookes]]
  |votes      = '''21,010'''
  |percentage = '''41.3%'''
  |change     = '''+9.7%'''
}}
{{Election box candidate with party link|
  |party      = Conservative Party (UK)
  |candidate  = [[David TC Davies]]
  |votes      = 17,672
  |percentage = 34.8%
  |change     = -17.3%
}}
{{Election box candidate with party link|
  |party      = Reform UK
  |candidate  = Max Windsor-Peplow
  |votes      = 5,438
  |percentage = 10.7%
  |change     = +9.8%
}}
{{Election box candidate with party link|
  |party      = Green Party of England and Wales
  |candidate  = Ian Chandler
  |votes      = 2,357
  |percentage = 4.6%
  |change     = +2.1%
}}
{{Election box candidate with party link|
  |party      = Welsh Liberal Democrats
  |candidate  = [[William Powell (Liberal Democrat politician)|William Powell]]
  |votes      = 2,279
  |percentage = 4.5%
  |change     = -5.1%
}}
{{Election box candidate with party link|
  |party      = Plaid Cymru
  |candidate  = Ioan Rhys Bellin
  |votes      = 1,273
  |percentage = 2.5%
  |change     = +0.1%
}}
{{Election box candidate with party link|
  |party      = Independent (politician)
  |candidate  = Owen Lewis
  |votes      = 457
  |percentage = 0.9%
  |change     = +0.9%
}}
{{Election box candidate|
  |party      = True and Fair Party
  |candidate  = June Davies
  |votes      = 255
  |percentage = 0.5%
  |change     = +0.5%
}}
{{Election box candidate with party link|
  |party      = Heritage Party (UK)
  |candidate  = Emma Meredith
  |votes      = 103
  |percentage = 0.2%
  |change     = +0.2%
}}

{{Election box rejected
  |votes      = 
  |percentage = 
  |change     = 
}}
{{Election box majority
  |votes      = 3,338
  |percentage = 6.5%
  |change     = 
}}
{{Election box turnout
  |votes      = 50,844
  |percentage = 68%
  |change     = -4.7%
}}
{{Election box registered electors
  |reg. electors = 74,823
}}
{{ Bocs ennill etholiad etholaeth newydd |
|enillydd     = Y Blaid Lafur (DU)
}}
{{Election box end}}
===Etholiadau 1832 i 1885===
[[Delwedd:Lord Granville Somerset.JPG|bawd|yr Arglwydd Granville Somerset]]
Rhwng y Ddeddf Diwygio Mawr a diddymu'r etholaeth ym 1885, bu dim ond tri etholiad cystadleuol yn Etholaeth Sir Fynwy:
{{Dechrau bocs etholiad |
  |teitl=[[Etholiad cyffredinol y Deyrnas Unedig, 1847|Etholiad cyffredinol 1847]]: Sir Fynwy
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  =''' [[Charles Octavius Swinnerton Morgan]]'''
  |pleidleisiau = 2,334
  |canran    = 34.5
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  = '''[[Granville Charles Henry Somerset|Yr Arglwydd Granville Somerset]]'''
  |pleidleisiau = 2,230
  |canran    = 33.1
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  = [[Edward Arthur Somerset]]
  |pleidleisiau = 2,187
  |canran    = 32.4
  |newid     = 
}}
{{Bocs mwyafrif etholiad|
  |pleidleisiau = 104
  |canran       = 
  |newid        =  
}} 
{{Bocs mwyafrif etholiad|
  |pleidleisiau = 47
  |canran       = 
  |newid        =  
}}

{{Bocs y nifer a bleidleisiodd mewn etholiad|
  |pleidleisiau = 
  |canran       = 
  |newid        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}

{{Diwedd bocs etholiad}}

{{Dechrau bocs etholiad |
  |teitl=[[Etholiad cyffredinol y Deyrnas Unedig, 1868|Etholiad cyffredinol 1868]]: Sir Fynwy
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  =''' [[Charles Octavius Swinnerton Morgan]]'''
  |pleidleisiau = 3,761
  |canran    = 39.1
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  = '''[[Poulett George Henry Somerset]]'''
  |pleidleisiau = 3,525
  |canran    = 36.7
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Ryddfrydol (DU)
  |ymgeisydd  = H Morgan Clifford
  |pleidleisiau = 2,338
  |canran    = 24.2
  |newid     = 
}}
{{Bocs mwyafrif etholiad|
  |pleidleisiau = 236
  |canran       = 
  |newid        =  
}} 
{{Bocs mwyafrif etholiad|
  |pleidleisiau = 1,187
  |canran       = 
  |newid        =  
}}

{{Bocs y nifer a bleidleisiodd mewn etholiad|
  |pleidleisiau = 
  |canran       = 
  |newid        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}

{{Diwedd bocs etholiad}}

{{Dechrau bocs etholiad |
  |teitl=[[Etholiad cyffredinol y Deyrnas Unedig, 1880|Etholiad cyffredinol 1880]]: Sir Fynwy
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  =''' [[Frederick Courtenay Morgan]]'''
  |pleidleisiau = 3,529
  |canran    = 27.7
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Geidwadol (DU)
  |ymgeisydd  = '''[[John Allan Rolls, Barwn 1af Llangatwg|John Rolls]]'''
  |pleidleisiau = 3,294
  |canran    = 25.8
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Ryddfrydol (DU)
  |ymgeisydd  = G C Broderick
  |pleidleisiau = 3,019
  |canran    = 23.7
  |newid     = 
}}
{{Bocs ymgeisydd etholiad gyda dolen plaid|
  |plaid      = Y Blaid Ryddfrydol (DU)
  |ymgeisydd  = [[Cornelius Marshall Warmington]]
  |pleidleisiau = 2927
  |canran    = 22.9
  |newid     = 
}}

{{Bocs mwyafrif etholiad|
  |pleidleisiau = 235
  |canran       = 
  |newid        =  
}} 
{{Bocs mwyafrif etholiad|
  |pleidleisiau = 275
  |canran       = 
  |newid        =  
}}

{{Bocs y nifer a bleidleisiodd mewn etholiad|
  |pleidleisiau = 
  |canran       = 
  |newid        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}
{{Bocs dal etholiad gyda dolen plaid|
  |enillydd     = Y Blaid Geidwadol (DU)
  |gogwydd        = 
}}
{{Diwedd bocs etholiad}}

==Gweler hefyd==
*[[Mynwy (etholaeth seneddol)]]

==Cyfeiriadau==
{{cyfeiriadau}}

{{Etholaethau seneddol i Dŷ'r Cyffredin yng Nghymru}}

[[Categori:Etholaethau Senedd y Deyrnas Unedig yng Nghymru]]
[[Categori:Etholaethau hanesyddol yng Nghymru]]
[[Categori:Sir Fynwy]]
[[Categori:Sefydliadau 2024]]
Defnyddir y nodiadau hyn ar y dudalen hon:
Dychwelyd at Sir Fynwy (etholaeth seneddol).
Wedi dod o "https://cy.wikipedia.org/wiki/Sir_Fynwy_(etholaeth_seneddol)"