David Haraldsson was joint

Earl of Orkney Earl of Orkney, historically Jarl of Orkney, is a title of nobility encompassing the archipelagoes of Orkney and Shetland, which comprise the Northern Isles of Scotland. Originally founded by Norse invaders, the status of the rulers of the Nort ...

from 1206 to 1214. David Haraldsson and his brother

Jon Haraldsson Jon Haraldsson was a Norwegian noble who served as the Jarl of Orkney between 1206 and 1231. Jon Haraldsson and his brother David were the sons of Harald Maddadsson with his second wife Hvarflod, daughter of Earl Máel Coluim of Moray. Jon and ...

were the sons of

Harald Maddadsson Harald Maddadsson (Old Norse: ''Haraldr Maddaðarson'', Gaelic: ''Aralt mac Mataid'') (c. 1134 – 1206) was Earl of Orkney and Mormaer of Caithness from 1139 until 1206. He was the son of Matad, Mormaer of Atholl, and Margaret, daughter ...

with his second wife Hvarflod, daughter of Earl Máel Coluim of Moray. Jon and David became joint Earls of Orkney after the death of their father in 1206. David Haraldsson died of sickness in 1214, leaving Jon Haraldsson to rule alone.

Sources

* Pálsson, Hermann and Paul Edwards, tr. ''Orkneyinga Saga: The History of the Earls of Orkney'' (Penguin, London, 1978) Earls of Orkney 13th-century mormaers Mormaers of Caithness {{Orkney-bio-stub