Romerike is a landscape, and traditionally a province, in what is today south-eastern Norway (north-east of Oslo). It consists of the municipalities Enebakk, Fet, Gjerdrum, Lørenskog, Nittedal, Rælingen, Skedsmo and Sørum in the southern end (Nedre Romerike), and Ullensaker, Gjerdrum, Nannestad, Eidsvoll and Hurdal in the northern end (Øvre Romerike).
Romerike (Old NorseRaumaríki) was once a petty kingdom which had its age of greatness between the 5th century and the 7th century. Snorri Sturluson relates that it was brutally conquered from Sweden by Harald Fairhair. The centre of the kingdom was Sand between Jessheim and Garder, where were situated the earliest settlements and where the soil was easy to cultivate. In the sourrounding forests there was rich game. Its name may be derived from the Raum elfr an old name for the Glomma river.
Jordanes
The 6th century Goth scholar Jordanes wrote in his Getica about a tribe located in Scandza which he named the Raumarici and which seems to be the same name as Raumariki, the old name for Romerike.
In Beowulf
In Beowulf, the tribe is mentioned as the warlike Heaðo-Reamas (i.e. battling Reamas, for the correspondence between Reamas and Raumar compare Geatas and Gautar).
In Hversu Noregr byggdist and in Thorsteins saga Víkingssonar
Snorri Sturluson relates in his Heimskringla that it first accepted the rule of the semi-legendary Swedish kings, Sigurd Ring and Ragnar Lodbrok and later of Erik Emundsson. However, it was forcibly conquered by Harald Fairhair who had to spend a summer to lead it into the fold of his newly created kingdom of Norway.
As soon as Halfdan had returned to Vestfold, King Eystein went out with his army to Raumarike, and laid the whole country in subjection to him.
The people thought so much of him, that when his death was known and his body was floated to Ringerike to bury it there, the people of most consequence from Raumarike, Vestfold, and Hedemark came to meet it.
All desired to take the body with them to bury it in their own district, and they thought that those who got it would have good crops to expect.