Ha, it's BI-toof (bi like in bit) and in Kashubian Bëtowò. Their city website has some nice multimedia* BTW, the songs (Bytów w piosence) is particularly great. They commissioned some Pomeranian artists (not the dogs, though that would be even cooler, the region) to record them, many are written especially for this page. Some are even pò kaszëbe. Anyway, it's a really nice place that had an unfortunate occupant. Now try to pronounce Bydgoszcz ;)
* https://www.bytow.com.pl/Multimedia,27