Where does “suon” come from?

suon (Old French) comes from Latin sonus, from Latin sonō, from Proto-Italic *swonaō — to sound, resound.

Ancestry of “suon”, step by step

StepLanguageWordMeaning
1Latinsonussound, noise; pitch; speech; tone, character,...
2Latinsonōto sound, resound, make a sound or noise (and various sounds in-context)
3Proto-Italic*swonaōto sound, resound
Every word from Proto-Italic *swonaō →Every word from Latin sonō →Every word from Latin sonus →
suon — Etymology, Origin & Word History | Etymology Explorer