Berle-Kari (Berle-Kåre; Old Norse : Berðlu-Kári) was a viking chieftain who lived in ninth-century Norway. His home was at Berle (Old Norse: Berðla), in present-day Bremanger in Sogn og Fjordane county. Landnámabók names him as the son of Vemund, and brother of Skjoldolf, one of the early settlers of Iceland.
According to Egil's Saga , Kari was a berserker, and a comrade-at-arms of Ulf the Fearless (Úlfr inn óargi). [a] . The saga also Kari's three offspring as: Olvir Hnufa, who became a skald in the court of Harald I of Norway, Eyvind Lambi, who became one of Harald's hersirs, and a daughter, Salbjorg, who married Kveldulf Bjalfason. Kveldulf being grandson of the elder Ulf. [2] [b]
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.

Egill's Saga or Egil's saga is an Icelandic saga on the lives of the clan of Egill Skallagrímsson, an Icelandic farmer, viking and skald. The saga spans the years c. 850–1000 and traces the family's history from Egill's grandfather to his offspring.
Rognvald Eysteinsson was the founding Jarl of Møre in Norway, and a close relative and ally of Harald Fairhair, the earliest known King of Norway. In the Norse language he is known as Rǫgnvaldr Eysteinsson (Mǿrajarl) and in modern Norwegian as Ragnvald Mørejarl. He is sometimes referred to with bynames that may be translated into modern English as "Rognvald the Wise" or "Rognvald the Powerful".
Grímr Kveldúlfsson, usually called Skalla-Grímr, was a Norwegian who lived in the ninth and tenth centuries. He is an important character in Egils saga and is mentioned in the Landnámabók.
Bragi Boddason, known as Bragi the Old was a Norwegian skald active in the first half of the 9th century, the earliest known skald from whom verses have survived. Portions of his Ragnarsdrápa are preserved in Snorri Sturluson's Edda.
Gard Agdi appears in the legendary genealogies of Hversu Noregr byggdist as one of the three sons of Nór, the legendary first king of Norway, and as ruler and ancestor of rulers over southwestern Norway. The nickname Agdi may refer to a member of the Egðir, a tribe inhabiting the southernmost region of Norway known as Agder, represented today by the counties of Aust-Agder and Vest-Agder.

Egil Skallagrímsson was a Viking Age war poet, sorcerer, berserker, and farmer. He is known mainly as the anti-hero of Egil's Saga. Egil's Saga historically narrates a period from approximately 850 to 1000 AD and is believed to have been written between 1220 and 1240 AD.
Snorri Thorfinnsson was the son of explorers Thorfinn Karlsefni and Gudrid Thorbjarnardóttir. He is considered to be the first child of European descent to be born in the Americas, apart from Greenland. He became an important figure in the Christianisation of Iceland.
Ketill Björnsson, nicknamed Flatnose, was a Norse King of the Isles of the 9th century.
Haukr or Hauk Erlendsson was lawspeaker (lawman) of Iceland, later lawspeaker and knight of Norway, known for having compiled a number of Icelandic sagas and other materials mostly in his own hand, bound in a book called the Hauksbók after him.
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.
Ketils saga hœngs or The Saga of Ketil Trout is an Icelandic legendary saga on the Norwegian chieftain Ketil Hallbjarnarson Haeng, also known as "Ketil Trout of Hrafnista". Hrafnista is present-day Ramsta, Hålogaland, Northern Norway.
Ketil Thorkelsson, better known by his nickname Ketil Trout or Ketil Salmon was a Norwegian military commander (hersir) of the late ninth century who settled in Iceland around 900 CE. He appears in Egils saga, the Landnámabók, and other Icelandic sources.
Thorolf Kveldulfsson was the oldest son of Kveldulf Bjalfasson and brother of the Norwegian/Icelandic goði and skald Skalla-Grimr. His ancestor Hallbjorn was nicknamed "halftroll", possibly indicating Norwegian-Sami ancestry.
Ulf Bjalfason was a renowned hersir and landowner in ninth century Sogn, Norway. He is a main character in the early chapters of Egils saga and appears in the Landnámabók and other Icelandic sources. Kveldulf is described as an ulfhéðinn, a shape-shifter (hamrammr), or a berserker.
Ulf the Brave was a Norwegian hersir who lived in Namdalen in the eighth century CE. He was the father of Hallbjörn Half-Troll and Hallbera Ulfsdóttir, who was the mother of Kveldúlfr Bjálfason. Thus Ulf the Brave was the ancestor of the clan of Egill Skallagrimsson. He is briefly mentioned in Egils Saga.
Hallbera Ulfsdóttir was a Norse woman of the early ninth century CE. She was the daughter of Ulf the Brave. Hallbera married Bjalfi and bore him the son Kveldulf Bjalfasson; she was thus an ancestor of the clan of Egill Skallagrimsson.

Olvir Hnufa or Ölvir hnúfa was a Norwegian commander in a clan and poet of the late ninth and early tenth centuries, known from, among other sources, Egil's Saga, Skaldatal and the Prose Edda. Olvir was the son of the viking Berle-Kari and brother-in-law of Kveldulf Bjalfason, who married Olvir's sister Salbjorg Karadottir; he was thus uncle to Skallagrim and Thorolf Kveldulfsson and great uncle to the famous poet Egil Skallagrimsson. Olvir also had a brother named Eyvind Lambi. Olvir was a prominent member of the court of King Harald Fairhair, who united Norway under his rule in the late ninth or early tenth century. Among other famous poets, he served as one of King Harald's court poets. He also served as a warrior in Harald's retinue, and fought at the pivotal Battle of Hafrsfjord on the king's flagship. He is best known for his involvement in the conflict between Harald and Olvir's kinsman Thorolf Kveldulfsson, which ended with the latter's death. Only a few fragments of Olvir's poetry survive.
Salbjörg Káradóttir was a Norse woman of the late ninth century. She was the daughter of Berle-Kari and sister of Eyvind Lambi and Olvir Hnufa. Salbjörg is mentioned in Egil's saga, which says that she married Kveldulf Bjalfasson and had two children, Thorolf Kveldulfsson and Skallagrim Kveldulfsson, with him. She was the grandmother of the poet Egill Skallagrímsson, the main character of Egil's Saga.

Eyvind Lambi or Eyvind Lamb was a Norwegian Viking and hersir of the late ninth and early tenth centuries, known from, among other sources, Egils saga. Eyvind was the son of the Viking Berle-Kari and brother-in-law of Kveldulf Bjalfason, who married Eyvind's sister Salbjorg Karadottir; he was thus uncle to Skalla-Grímr and Thorolf Kveldulfsson and great uncle to the famous poet Egill Skallagrímsson. Eyvind also had a brother named Olvir Hnufa, who became a famous skald at the court of King Harald I of Norway.
[Phillip] Theisohn errs on several points of detail: ... Úlfr inn óargi, not Kveldúlfr ([2009 paper, ] 148), is Berðlu-Kári's partner in the opening chapter of the saga. ]
the marriage of Úlfr's grandson, Úlfr Bjálfason (called Kveld-Úlfr), to Kári's daughter Salbjǫrg.