Where does “coa” come from?

coa (Old Catalan) comes from Latin cauda, from Proto-Italic kaudā, from Proto-Indo-European keh₂udeh₂.

Ancestry of “coa”, step by step

StepLanguageWordMeaning
1LatincaudaA tail
2Proto-Italickaudātail
3Proto-Indo-Europeankeh₂udeh₂—
Every word from Proto-Indo-European keh₂udeh₂ →Every word from Proto-Italic kaudā →Every word from Latin cauda →