In Vikings, Ivar is portrayed as the son of Ragnar and Aslaug and a younger half-brother to Björn Ironside.
Historically: According to the old Norse story “The Tale of Ragnar's Sons,” Ivar was the firstborn of Ragnar and Aslaug, followed by Bjorn, then Hvitserk, then Sigurd.
Ivar Ragnarsson, also known as Ivar "the Boneless," is the youngest son of Ragnar Lothbrok and Aslaug.
Bjorn Lothbrok is the son of Ragnar and Lagertha and the oldest of Ragnar's many sons. Intelligent and determined, Bjorn loves and admires his father above all men.
Hvitserk was older than Ivar but he ended up being his pawn, used and dumped at Ivar's will. It was partly Hvitserk's mistake because he abandoned Ubbe, but Ivar just wasn't a good brother. Ivar exploited Hvitserk's love for him and used him to achieve his selfish interests.
Gunnhild is the true love of Bjorn's life, as much as he has one, and becomes his equal and his partner in many ways.
Hvitserk was born in the four year gap between Season 2 Episodes 1 and 2. Hvitserk is often seen alongside his brother Ubbe, and likely looks up to him.
Vikings: Hvitserk stars in deleted season six scene
Ivar the Boneless (played by Alex Høgh Andersen) was unceremoniously killed by an unknown English soldier in the grand finale of Vikings.
When Ragnar died Björn Ironside inherited Sweden. He had two sons, Refil and Erik Björnsson, who became the next king of Sweden.
In the series, Ivar is romantically linked to Freydis (Alicia Agneson) and Princess Katia. In season five Freydis gave birth to her first child, Baldur, with Ivar being officially recognised as his father.
Ivar remains a local king in England for a long time after, ruling from York but having no children to succeed him, 'because of the way he was: with no lust or love' (4).
Grave 511. The warrior was at least between 35 and 45 years old when he died, and he had met with a very violent death, presumably in battle, killed by the thrust of a spear into his eye and a great slashing blow to the top of his left femur, which also removed his genitals.
Who was Ivar the Boneless? Ivar the Boneless was a Viking chieftain who was said to be the son of the Danish king Ragnar Lothbrok. Ivar invaded England not to plunder, as was typical of Viking raiders, but to conquer. Much of what is known about his life is from legend.
According to the Saga of Ragnar Lodbrok, Ivar was his eldest son. It is said that he was fair, big, strong and one of the wisest men who has ever lived. He was a trusted advisor to his brothers Bjorn Ironside, Ubbe, Halfdan and Sigurd Snake-in-the-Eye.
His mother, Aslaug, Ragnar's third wife was described as a völva, a seer or clairvoyant. Aslaug suggested that she and her husband wait for three nights before consummating their marriage after a long separation while he was in England raiding.
In the show, Ivar is born with a disability which means he can't walk and it seems highly unlikely that he will be able to do so again. Ivar is seen charging into battle on a chariot led by a horse and has to drag himself around when he isn't on it.
Ivar the Boneless was feared for his cunning in battle and his ruthless reputation during the attempted Viking conquests of England. During the 9th and 10th centuries, the Vikings aggressively attacked and colonized the eastern parts of England.
According to this text, Ubba was the son of Ragnar Lodbrok and an unnamed daughter of a certain Hesbernus. Gesta Danorum does not associate Ubba with Anglo-Saxon England in any way.
However, Lothbrok is merely a nickname with the meaning "shaggy breeches", not a family name. Therefore, in theory the sons should be referred to as "Bjorn Ragnarsson”, meaning son of Ragnar. According the the site, family names were not used in Scandinavia at that time and did not become common until 17th century.
Björn - Baldr or Thor
Baldr (also called Balder and Baldur), is the son of Odin and Frigg and brother of Thor.
After splitting up with Bjorn, Torvi marries Bjorn's half-brother Ubbe, with whom she has one child, Ragnar.
Hvitserk spun it, saying that he had avenged his and Ubbe's mother, Aslaug, who Lagertha had killed when she took over Kattegat. Then it came time for Bjorn to decide Hvitserk's punishment, and he settled on death.
One of the leading characters in the final 10 episodes was Hvitserk (played by Marco Ilsø) and his character went through a shocking twist. At the end of the series, Hvitserk turned to Christianity and he was given the new name, Athelstan.