From Middle English bek, bekk, becc, from Old Norse bekkr, from Proto-Germanic *bakiz.
Cognate with Low German bek, beck, German Bach, Dutch beek, Swedish bäck, Old English bæc, bec, bæċe, beċe. batch. More at beach.
From Middle English bekken, a shortened form of Middle English bekenen, from Old English bēcnan, bēacnian, from Proto-West Germanic *baukn, from Proto-Germanic *baukną. More at beacon.