Bishop of York 678–86 and 691–705. This monk of Whitby was consecrated by Theodore bishop of Deira (the southern half of Northumbria, roughly the equivalent of modern Yorkshire) when Wilfrid had been expelled from Northumbria following his quarrels with King Egfrith. Bosa ruled his diocese until his death except for the years of Wilfrid's restoration. Bede praised his ‘singular merit and holiness’; one of his disciples was Acca, later the follower and successor of Wilfrid at Hexham. Feast: 9 March.
From The Oxford Dictionary of Saints in Oxford Reference.