Where does “penn” come from?

penn (Old Breton) comes from Proto-Brythonic penn, from Proto-Celtic kʷennom — head.

Ancestry of “penn”, step by step

StepLanguageWordMeaning
1Proto-Brythonicpennhead
2Proto-Celtickʷennomhead

Words derived from “penn”

Every word from Proto-Celtic kʷennom →Every word from Proto-Brythonic penn →