Brim-wísa

According to the Old English Dictionary:

an;

brim-wísa

m. [brim, wísa a leader, guide] A sea-leader, leader of sailors; per maris æstum dux, nautarum dux :-- Abreót brimwísan, brýd aheorde he slew the sea-leader, set free his bride, Beo. Th. 5852; B. 2930. brim-wisa