Where does “Szczyrba” come from?

Szczyrba (Polish) comes from Polish szczerba, from Proto-Slavic ščьrba, from Proto-Balto-Slavic *skirbā.

Ancestry of “Szczyrba”, step by step

StepLanguageWordMeaning
1Polishszczerbagap, dent, jag, chip, nick, notch
2Proto-Slavicščьrbagap?, dent?, crack?
3Proto-Balto-Slavic*skirbā—
Every word from Proto-Balto-Slavic *skirbā →Every word from Proto-Slavic ščьrba →Every word from Polish szczerba →