Where does “Stastny” come from?

Stastny (English) comes from Czech Šťastný, from Old Czech sčastný, from Proto-Slavic *sъčęstьnъ — happy; lucky.

Ancestry of “Stastny”, step by step

StepLanguageWordMeaning
1CzechŠťastnýhappy of a person
2Old Czechsčastnýhappy
3Proto-Slavic*sъčęstьnъhappy; lucky
Every word from Proto-Slavic *sъčęstьnъ →Every word from Old Czech sčastný →Every word from Czech Šťastný →
Stastny — Etymology, Origin & Word History | Etymology Explorer