Where does “brach” come from?

brach (Old Czech) comes from Old Czech bratr, from Proto-Slavic bratrъ, from Proto-Balto-Slavic brā́ˀtē, from Proto-Indo-European bʰréh₂tēr — brother.

Ancestry of “brach”, step by step

Step	Language	Word	Meaning
1	Old Czech	bratr	—
2	Proto-Slavic	bratrъ	brother
3	Proto-Balto-Slavic	brā́ˀtē	brother
4	Proto-Indo-European	bʰréh₂tēr	brother

Every word from Proto-Indo-European bʰréh₂tēr →

brach — Etymology, Origin & Word History | Etymology Explorer