Brughach an early Irish prelate, was bishop of Rath-mighe-Aenigh, a church situated in Tirenna, in Tyrconnel, probably the church of Rath, near Manor Cunningham, County Donegal. But Dr. Reeves says (S. Adamnan, page 192, n) it is what is now called Ravmochy, in the barony of Raphoe. He is said to have been of the race of Colla da-Chrioch; and, perhaps, was the son of Sedna and disciple of St. Degaidh. His dedication is given on November 1. He was consecrated by St. Patrick for Rath-Mugeaonaich, and afterwards himself consecrated St. Cairpre (November 11). But Lanigan (Eccl. Hist. Ireland, 2:77, 79) points out that Brughach must have been bishop there after St. Bolcan, and the latter could scarcely have been a bishop till after St. Patrick's death.