Beulan

Beulan a British divine and historian of the 7th century, was the instructor of the celebrated Nennius, afterwards abbot of the monastery of Bangor. He is said to have written a work entitled De Genealogiis Gentium. See Allibone,ῥ Dict. of Brit. and Amer. Authors, s.v.; Chalmers, Biog. Dict. s.v.