Where does “Răcăreanu” come from?

Răcăreanu (Romanian) comes from Romanian Răcari, from Romanian răcar, from Romanian rac, from Proto-Slavic rakъ, from Proto-Balto-Slavic rṓˀkas, from Proto-Indo-European wreh₃kʷos — looking backwards.

Ancestry of “Răcăreanu”, step by step

StepLanguageWordMeaning
1RomanianRăcari—
2Romanianrăcarperson who fishes or sells crayfish
3Romanianraccrayfish; cancer; Cancer
4Proto-Slavicrakъcrayfish
5Proto-Balto-Slavicrṓˀkas—
6Proto-Indo-Europeanwreh₃kʷoslooking backwards
Every word from Proto-Indo-European wreh₃kʷos →Every word from Proto-Balto-Slavic rṓˀkas →Every word from Proto-Slavic rakъ →