Where does “Ceatta” come from?

Ceatta (Old English) comes from Primitive Irish ᚉᚐᚈᚈᚒ, from Proto-Celtic katus, from Proto-Indo-European kéh₃tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “Ceatta”, step by step

StepLanguageWordMeaning
1Primitive Irishᚉᚐᚈᚈᚒbattle
2Proto-Celtickatusbattle
3Proto-Indo-Europeankéh₃tusfight
4Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tus →Every word from Proto-Indo-European kéh₃tus →Every word from Proto-Celtic katus →