Where does “-au” come from?

-au (Welsh) comes from Middle Welsh -eu, from Old Welsh -ou, from Proto-Brythonic -ow, from Proto-Celtic -owes.

-au (Welsh): -s

Definitions

  1. -s

Ancestry of “-au”, step by step

StepLanguageWordMeaning
1Middle Welsh-eu—
2Old Welsh-ou—
3Proto-Brythonic-ow—
4Proto-Celtic-owes—

Words derived from “-au”

Every word from Proto-Celtic -owes →Every word from Middle Welsh -eu →Every word from Proto-Brythonic -ow →