Where does “Bolătău” come from?

Bolătău (Romanian) comes from Old East Slavic болото, from Proto-Slavic bolto, from Proto-Balto-Slavic balta.

Ancestry of “Bolătău”, step by step

StepLanguageWordMeaning
1Old East Slavicболото—
2Proto-Slavicboltoswamp; mud
3Proto-Balto-Slavicbalta—
Every word from Proto-Balto-Slavic balta →Every word from Proto-Slavic bolto →Every word from Old East Slavic болото →