Where does “gwanwynau” come from?
gwanwynau (Welsh) comes from Welsh gwanwyn, from Middle Welsh gwaeanhwyn, from Old Welsh guiannuin, from Proto-Brythonic wesantēnos, from Proto-Celtic wesantos, from Proto-Celtic wesr-, from Proto-Indo-European wósr̥ — spring.
gwanwynau (Welsh): plural of gwanwyn
Ancestry of “gwanwynau”, step by step