Where does “Brzenk” come from?

Brzenk (Polish) comes from Polish brzęk, from Polish brzęczeć, from Proto-Slavic bręčati — to buzz.

Ancestry of “Brzenk”, step by step

Step	Language	Word	Meaning
1	Polish	brzęk	clank, clink, tinkle; twang; buzz, hum, humming
2	Polish	brzęczeć	to buzz; to hum; to clang
3	Proto-Slavic	bręčati	to buzz

Brzenk — Etymology, Origin & Word History | Etymology Explorer