Harald I Olafsson 2835
- Born: 1220, Isle of Man, Norway
- Marriage (1): Cecilia Håkonsdotter in 1248 2030
- Died: 1248
King Harald of the Isle of Man was the son of his predecessor, King Olaf II of the Isle of Man.
He rose to power in the after his father's death. His father had acquired a sizable empire during his rule, spanning many islands. Finding himself in control of this, Harald decided to tour his dominion and left his cousin Laglan as a steward in his absence. During Harald's absence, Laglan caused a "great disturbance", though what actually transpired is unknown. On Harald's return, Laglan fled the island along with Harald's youngest son.
After his return, Harald ruled peacefully over his significant empire. During this time he was knighted by King Henry III of England.
King Harald eventually died in a shipwreck off the coast of Shetland when returning from Norway after marrying the daughter of Norway's King. He was succeeded by King Ragnald II of the Isle of Man.
Noted events in his life were:
• He worked as a King of Isle of Man.
Harald married Cecilia Håkonsdotter, daughter of Håkon IV Håkonsson den Gamle of Norway and Kanga, in 1248.2030 (Cecilia Håkonsdotter was born circa 1220 and died in 1248.)