Where does “Katuwelnāmnos” come from?

Katuwelnāmnos (Proto-Celtic) comes from Proto-Celtic katus, from Proto-Indo-European kéh₃tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “Katuwelnāmnos”, step by step

Katuwelnāmnos traces back through two separate lines of ancestry.

via Proto-Celtic katus

StepLanguageWordMeaning
1Proto-Celtickatusbattle
2Proto-Indo-Europeankéh₃tusfight
3Proto-Indo-European-tusDerives action nouns from verb roots

via Proto-Celtic wolnāmnos

StepLanguageWordMeaning
1Proto-Celticwolnāmnos—
Every word from Proto-Indo-European -tus →Every word from Proto-Indo-European kéh₃tus →Every word from Proto-Celtic katus →