Where does “Sym” come from?

Sym (Polish) comes from Mansi сым, from Persian سیم, from Persian سی, from English cee, from Middle English cee, from Old French sei, from Latin sēdēs, from Latin sedeō — to sit.

Ancestry of “Sym”, step by step

StepLanguageWordMeaning
1Mansiсымheart
2Persianسیمwire; silver; thirtieth
3Persianسیthirty; for; in order to
4EnglishceeThe name of the Latin-script letter C; Something...
5Middle EnglishceeAlternative form of see
6Old Frenchsei
7Latinsēdēsseat, chair
8Latinsedeōto sit, to be seated
9Proto-Italicsedēōsit, be sitting, be seated
10Proto-Indo-Europeansḗd-to sit
Every word from Proto-Indo-European sḗd-Every word from Proto-Italic sedēōEvery word from Latin sedeō