-escu

(Can this⁽⁺⁾ etymology be sourced?) Derived from Late Latin, Vulgar Latin -iscus m. Compare Romanian -esc.

-escu (feminine -eascã)

1. -ish, -esque (added to a root to form an adjective)

• armãnescu
• bãrbãtescu
• crishtinescu
• frãtsescu
• uminescu

• -eashti (adverbial form)

(Can this⁽⁺⁾ etymology be sourced?) Derived from Latin -ēscō (and -ēscunt in the case of the third-person plural). Cognates include Romanian -esc, Italian -isco, -iscono, Spanish -ezco, -ecen, Catalan -eixo, -eixen.

• -ãscu

-escu

1. Used with a stem to form the first-person singular and third-person plural present of most regular fourth conjugation verbs. E.g. unescu, tushescu, firescu, pãtsãscu, urãscu.

• -eshti
• -eashti

(Can this⁽⁺⁾ etymology be sourced?) From the suffix -esc, from Latin -iscus. Compare Italian -eschi.

• IPA^(key): /ˈes.ku/

-escu

1. suffix forming many Romanian surnames, e.g. Ionescu, Petrescu, Popescu, Georgescu, Marinescu, Niculescu, Constantinescu, Văcărescu, Lucescu, Lupescu, Albulescu, Ceaușescu, etc.

• -escu in DEX online—Dicționare ale limbii române (Dictionaries of the Romanian language)