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 Scandinavian Scotland, founded by Norse invaders, the status ...

with his brothers Brusi and Einar Wry-Mouth following the death of their father, Sigurd Hlodvisson at the

battle of Clontarf The Battle of Clontarf () 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 forces of Sigtrygg Silkbea ...

. 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 ''Orkneyinga saga'' (Old Norse: ; ; also called the ''History of the Earls of Orkney'' and ''Jarls' Saga'') is a narrative of the history of the Orkney and Shetland islands and their relationship with other local polities, particularly No ...

: 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