Auðunn was a Norwegian and was for a while a priest of Trondenes Church in Hålogaland (not far from the present-day town of Harstad in northern Norway).
He arrived in Iceland in the summer of 1315 (at Seleyri í Borgarfirði) and rode north to Hólar.
[1] Major achievements during his episcopate were his translation of the relics of Bishop Guðmundur Arason, helping to establish his feast within the northern Church.
[3] In the summer of 1320, Auðunn sailed to Norway, amongst other things to protect his interests in his dealing with the Icelanders, and died in Nidaros on 28 January 1322.
Auðunn had at least one daughter, Ölöf, whose son Eysteinn rauði became a prominent cleric under the tutelage of his grandfather and Laurentius.