The Orkneyinga saga is a narrative of the history of the Orkney and Shetland islands and their relationship with other local polities, particularly Norway and Scotland. The saga has "no parallel in the social and literary record of Scotland" and is "the only medieval chronicle to have Orkney as the central place of action". The main focus of the work is the line of jarls who ruled the Earldom of Orkney, which constituted the Norðreyjar or Northern Isles of Orkney and Shetland and there are frequent references to both archipelagoes throughout.
Saint Magnus Erlendsson, Earl of Orkney, sometimes known as Magnus the Martyr, was Earl of Orkney from 1106 to about 1117.
Magnus Haraldsson was King of Norway from 1066 to 1069, jointly with his brother Olaf Kyrre from 1067. He was not included in official Norwegian regnal lists until modern times, but has since been counted as Magnus II.
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 founded by Norse invaders, the status of the rulers of the Northern Isles as Norwegian vassals was formalised in 1195. Although the Old Norse term jarl is etymologically related to "earl", and the jarls were succeeded by earls in the late 15th century, a Norwegian jarl is not the same thing. In the Norse context the distinction between jarls and kings did not become significant until the late 11th century and the early jarls would therefore have had considerable independence of action until that time. The position of Jarl of Orkney was eventually the most senior rank in medieval Norway except for the king himself.
Sigurd Magnusson, also known as Sigurd the Crusader, was King of Norway from 1103 to 1130. His rule, together with his half-brother Øystein, has been regarded by historians as a golden age for the medieval Kingdom of Norway. He is otherwise famous for leading the Norwegian Crusade (1107–1110), earning the eponym "the Crusader", and was the first European king to personally participate in a crusade.
Sigurd Håkonsson was a Norwegian nobleman and Jarl of Lade in Trøndelag.
Thorfinn Torf-Einarsson also known as Thorfinn Skull-splitter was a 10th-century Earl of Orkney. He appears in the Orkneyinga saga and briefly in St Olaf's Saga, as incorporated into the Heimskringla. These stories were first written down in Iceland in the early 13th century and much of the information they contain is "hard to corroborate".
Sigurd Magnusson was a Norwegian nobleman who campaigned against King Sverre of Norway during the Civil war era in Norway.
Haakon the Crazy was a Norwegian jarl and Birkebeiner chieftain during the civil war era in Norway. Håkon Galen was born no later than the 1170s and died in 1214. His epithet "the crazy" or "the mad" can also be translated as frenzied, furious or frantic and probably refers to ferociousness in battle.
The Earldom of Orkney is the official status of the Orkney Islands, and was a Norse territory ruled by the earls of Orkney from the ninth century until 1472. It was founded during the Viking Age by Viking raiders and settlers from Scandinavia. In the ninth and tenth centuries it covered the Northern Isles (Norðreyjar) of Orkney and Shetland, as well as Caithness and Sutherland on the mainland. It was a dependent territory of the Kingdom of Norway until 1472, when it was absorbed into the Kingdom of Scotland. Originally, the title of Jarl or Earl of Orkney was heritable.
Thorfinn Sigurdsson, also known as Thorfinn the Mighty, was an 11th-century Jarl of Orkney. He was the youngest of five sons of Jarl Sigurd Hlodvirsson and the only one resulting from Sigurd's marriage to a daughter of Malcolm II of Scotland. He ruled alone as jarl for about a third of the time that he held the title and jointly with one or more of his brothers or with his nephew Rögnvald Brusason for the remainder. Thorfinn married Ingibiorg Finnsdottir, daughter of Finn Arnesson, Jarl of Halland.
Sigurd Hlodvirsson, popularly known as Sigurd the Stout from the Old Norse Sigurðr digri, was an Earl of Orkney. The main sources for his life are the Norse Sagas, which were first written down some two centuries or more after his death. These engaging stories must therefore be treated with caution rather than as reliable historical documents.
Rögnvald Kali Kolsson, also known as Saint Ronald of Orkney, was a Norwegian earl of Orkney who came to be regarded as a Christian saint. Two of the Orkney Islands are named after Rögnvald, namely North Ronaldsay and South Ronaldsay.
Harald Maddadsson was Earl of Orkney and Mormaer of Caithness from 1139 until 1206. He was the son of Matad, Mormaer of Atholl, and Margaret, daughter of Earl Haakon Paulsson of Orkney. Of mixed Norse and Gaelic blood, and a descendant of Scots kings, he was a significant figure in northern Scotland, and played a prominent part in Scottish politics of the twelfth century. The Orkneyinga Saga names him one of the three most powerful Earls of Orkney along with Sigurd Eysteinsson and Thorfinn Sigurdsson.
Ingibiorg Finnsdottir was a daughter of Earl Finn Arnesson and Bergljot Halvdansdottir. She was also a niece of Kings Olaf II and Harald Hardrada of Norway. She is also known as Ingibiorg, the Earls'-Mother. The dates of her life are not known with certainty.
The Mormaer of Caithness was a vassal title mostly held by members of the Norwegian nobility based in Orkney from the Viking Age until 1350. The mormaerdom was held as fief of Scotland and the title was frequently held by the Norse Earls of Orkney, who were thus a vassal of both the King of Norway and the King of Scots. There is no other example in the history of either Norway or of Scotland in which a dynasty of earls owed their allegiance to two different kings.
Haakon Paulsson was a Norwegian jarl who ruled the earldom of Orkney together with his cousin Magnus Erlendsson from 1105 to 1123. Their lives and times are recounted in the Orkneyinga saga, which was first written down in the early 13th century by an unknown Icelandic author.
Kristin Sigurdsdatter was a Norwegian princess and mother of King Magnus V of Norway.
Helga Moddansdóttir was the mistress of Haakon Paulsson who was Earl of Orkney from 1105 to 1123.
