From Middle English brytten, brutten, from Old English brittian, bryttian, from Proto-Germanic *brutjaną, from Proto-Indo-European *bʰrewd-. Cognate with Icelandic brytja, Swedish bryta, Danish bryde, and outside the Germanic family with Albanian brydh. Related to brytta, brēotan.
Probably from Middle English bret or birt, applied to a different kind of fish. See bret.