Where does “beblula” come from?

beblula (Polish) comes from Polish -uła, from Proto-Slavic *-uľa.

Ancestry of “beblula”, step by step

StepLanguageWordMeaning
1Polish-ułaforms nouns
2Proto-Slavic*-uľa—
Every word from Proto-Slavic *-uľa →Every word from Polish -uła →