Where does “-iadau” come from?

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

-iadau (Welsh): Pluralisation suffix

Definitions

  1. Pluralisation suffix

Ancestry of “-iadau”, step by step

StepLanguageWordMeaning
1Welsh-au-s
2Middle Welsh-eu—
3Old Welsh-ou—
4Proto-Brythonic-ow—
5Proto-Celtic-owes—

Words derived from “-iadau”

Every word from Proto-Celtic -owes →Every word from Welsh -au →Every word from Middle Welsh -eu →
-iadau — Etymology, Origin & Word History | Etymology Explorer