Where does “cnaw” come from?

cnaw (Welsh) comes from Middle Welsh knaw, from Old Irish cnáim, from Proto-Celtic knāmis, from Proto-Indo-European kónh₂m — leg.

Ancestry of “cnaw”, step by step

StepLanguageWordMeaning
1Middle Welshknawbone; skull
2Old Irishcnáimbone
3Proto-Celticknāmisbone
4Proto-Indo-Europeankónh₂mleg
Every word from Proto-Indo-European kónh₂m →Every word from Proto-Celtic knāmis →Every word from Old Irish cnáim →