Sumarlidi Sigurdsson (died between 1014 and 1018) was jointly

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 ...

with his brothers Brusi and

Einar Wry-Mouth Einar Sigurdsson (died 1020), also called Einarr rangmunnr Sigurðarson or Einar Wry-Mouth, was a son of Sigurd Hlodvirsson. He was jointly Earl of Orkney from 1014. His life is recorded in the '' Orkneyinga Saga''. When Earl Sigurd was killed ...

following the death of their father,

Sigurd Hlodvisson Sigurd Hlodvirsson (23 April 1014), popularly known as Sigurd the Stout from the Old Norse ''Sigurðr digri'',Thomson (2008) p. 59 was an Earl of Orkney. The main sources for his life are the Norse Sagas, which were first written down some tw ...

at the

battle of Clontarf The Battle of Clontarf ( ga, Cath Chluain Tarbh) took place on 23 April 1014 at Clontarf, near Dublin, on the east coast of Ireland. It pitted an army led by Brian Boru, High King of Ireland, against a Norse-Irish alliance comprising the forc ...

. Their half-brother, Thorfinn, was at that time very young, perhaps only five years old, and he was sent to be fostered by his grandfather, King Malcolm II. The sagas depict Sumarlidi as a wise, quiet and peaceful man. More is not told about him, other than that he died of illness in his bed only shortly after he became earl. After he was gone, there was a quarrel between Einarr and Thorfinn about who would inherit his part of the earldom.

References

* Anon., '' Orkneyinga Saga: The History of the Earls of Orkney'', tr. Hermann Pálsson and Paul Edwards. Penguin, London, 1978.
Orknøyingasoga, page 29 'Um Brødrene'
translated by Gustav Indrebø (Oslo 1929) Earls of Orkney 1010s deaths Year of birth unknown {{Scotland-earl-stub