Where does “Sierotowicz” come from?

Sierotowicz (Polish) comes from Polish Sierota, from Old Polish sirota, from Proto-Slavic sirota, from Proto-Slavic sirъ, from Proto-Indo-European śeiros, from Proto-Indo-European ḱei-ro-.

Ancestry of “Sierotowicz”, step by step

StepLanguageWordMeaning
1PolishSierotaorphan
2Old Polishsirota—
3Proto-Slavicsirotaorphan
4Proto-Slavicsirъorphaned
5Proto-Indo-Europeanśeiros—
6Proto-Indo-Europeanḱei-ro-—
Every word from Proto-Indo-European ḱei-ro- →Every word from Proto-Indo-European śeiros →Every word from Proto-Slavic sirъ →