Where does “Kozlowski” come from?

Kozlowski is a Polish surname derived from Polish kozioł, a diminutive of Polish koza, both tracing to Proto-Slavic kozьlъ and Proto-Slavic koza meaning goat.

Ancestry of “Kozlowski”, step by step

StepLanguageWordMeaning
1PolishKozłowski—
2PolishKoziołbillygoat
3Old Polishkozieł—
4Proto-Slavickozьlъhe-goat, buck
5Proto-Slavickožaskin; leather
6Proto-Slavic-jaSuffix creating feminine action nouns, usually...
7Proto-Indo-European-yeh₂—
Every word from Proto-Indo-European -yeh₂ →Every word from Proto-Slavic -ja →Every word from Proto-Slavic koža →