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Category:Old Irish masculine io-stem nouns

From Wiktionary, the free dictionary

Old Irish masculine io-stem nouns.

These nouns are masculine, typically with the following endings:

The stem classes are named from the perspective of Proto-Celtic and may not still be visible in Old Irish inflections. These nouns derive from Proto-Celtic masculine *-ios (masculine) and *-iom (neuter) endings. Originally the endings were the same as that of the o-stems, but later sound changes caused the two classes to diverge significantly.