Where does “Stanislaus” come from?

Stanislaus is the Latinized form of Russian Станисла́в, a Slavic name of uncertain ultimate origin and meaning.

Ancestry of “Stanislaus”, step by step

StepLanguageWordMeaning
1RussianСтанисла́в—
2Proto-Slavicslàvafame; glory; glory, fame
3Proto-Indo-Europeanḱlew-to hear
4Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ḱel- →Every word from Proto-Indo-European ḱlew- →Every word from Proto-Slavic slàva →