Where does “Ó Cathaláin” come from?

Ó Cathaláin (Irish) comes from Irish Cathalán, from Old Irish Cathal, from Proto-Celtic Katuwalos, from Proto-Celtic katus, from Proto-Indo-European kéh₃tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “Ó Cathaláin”, step by step

StepLanguageWordMeaning
1IrishCathalánlittle Cathal
2Old IrishCathal—
3Proto-CelticKatuwalosstrong in battle
4Proto-Celtickatusbattle
5Proto-Indo-Europeankéh₃tusfight
6Proto-Indo-European-tusDerives action nouns from verb roots

Words derived from “Ó Cathaláin”

Every word from Proto-Indo-European -tus →Every word from Proto-Indo-European kéh₃tus →Every word from Proto-Celtic katus →