Where does “synau” come from?

synau (Welsh) comes from Welsh sŵn, from Middle English soun, from Anglo-Norman sun, from Old French son, from Vulgar Latin sum, from Latin suus, from Proto-Italic sowos, from Proto-Indo-European sewos — self.

Ancestry of “synau”, step by step

StepLanguageWordMeaning
1Welshsŵnsound
2Middle Englishsounsound
3Anglo-Normansun
4Old Frenchsonhis/hers/its
5Vulgar Latinsumto be, exist, have; to be there; to go
6Latinsuushis, her, its, their
7Proto-Italicsowoshis, her, its, their
8Proto-Indo-Europeansewos(one's) own; his, her, its
9Proto-Indo-Europeanswéself
Every word from Proto-Indo-European swéEvery word from Proto-Indo-European sewosEvery word from Proto-Italic sowos
synau — Etymology, Origin & Word History | Etymology Explorer