Óláfr svarti

Óláfr Guðrøðarson
King of the Isles
The title, rex manniæ et insularum ("King of Mann and the Isles"), given to Óláfr in the Chronicle of Mann.
Reign	1226–1237
Predecessor	Rögnvaldr Guðrøðarson (d. 1229)
Died	21 May 1237 St Patrick's Isle
Burial	St Mary's Abbey, Rushen
Wives	1. Lauon 2. Christina
Issue	Haraldr, Rögnvaldr, and Magnús
Old Norse	Óláfr Svarti; Óláfr Guðrøðarson
Mediaeval Gaelic	Amlaíb mac Gofraid; Amhlaibh mac Gofraidh
Dynasty	Crovan dynasty
Father	Guðrøðr Óláfsson (d. 1187)
Mother	Finnguala

Óláfr Guðrøðarson (Old Norse pronunciation: [ˈoːlaːvr ˈɡuðruðarsson]), commonly known in English as Olaf the Black, was a mid 13th century sea-king who ruled the Isle of Man (Mann) and parts of the Hebrides. Óláfr was the son of Guðrøðr Óláfsson, King of the Isles, King of Dublin, and his wife Finnguala, granddaughter of Muirchertach Mac Lochlainn, High King of Ireland, King of Cenél nEógain. Óláfr was a younger son of his father; his elder brother Rögnvaldr more than likely had a different mother. According to the Chronicle of Mann, Guðrøðr appointed Óláfr as heir since he had been born "in lawful wedlock". Whether or not this is the case, on Guðrøðr's death in 1187 the Manxmen instead appointed Rögnvaldr as king, as he was a capable adult and Óláfr was a mere child. Rögnvaldr ruled the Crovan dynasty's island-kingdom for almost 40 years, during which time the half-brothers vied for the kingship.

At one point Óláfr, who had been given possession of Lewis, complained to Rögnvaldr that his lands were not enough. Rögnvaldr's response was seize Óláfr and send him to the King of Scots, where he was imprisoned for almost seven years. Upon his release, Óláfr undertook a pilgrimage to Santiago de Compostela, after which the half-brothers were reconciled and Rögnvaldr had Óláfr married to Lauon, the sister of his own wife. Sometime after 1217 this marriage was nullified by Reginald, Bishop of the Isles, who may have been an ally of Óláfr against Rögnvaldr. Óláfr then married Christina, a daughter of the King of Scots' protégé Ferchar, Earl of Ross. The chronicle claims that Rögnvaldr's bitter wife tricked their own son, Guðrøðr, into attempting to kill Óláfr; however, Óláfr narrowly escaped with his life and fled to the protection of his father-in-law on the mainland. Together with a loyal follower, one Páll Bálkason, Óláfr later defeated Guðrøðr on Skye.