Einarr Rognvaldarson often referred to by his byname Torf-Einarr (sometimes anglicised as Turf-Einarr), ("fl." early 890s–c. 910) was one of the Norse earls of Orkney. The son of the Norse "jarl", Rognvald Eysteinsson and a concubine, his rise to power is related in sagas which apparently draw on verses of Einarr's own composition for inspiration. After battling for control of the Northern Isles of Scotland and a struggle with Norwegian royalty, Einarr founded a dynasty which retained control of the islands for centuries after his death.