Hij heeft/had een relatie met Dageith Dagsdotter.
Kind(eren):
According to the Ynglinga saga, Alrek and Eirík were sons and heirs of the previous king Agni by his wife Skjálf. They shared the kingship. They were mighty in both war and sports, but were especially skillful horsemen and vied with one another about their horsemanship and their horses.
One day they rode off from their retinue and did not return. They were found dead with their heads battered but no weapons with them save the bridle bits of their horses. Accordingly it was believed that they had quarreled and come to blows and had slain each other with their bridle bits. They were succeeded by Alrik's sons Yngvi and Alf.
However, in other sources, only Alrek died, and in the piece of Ynglingatal quoted by Snorri Sturluson it is only Alrek who dies explicitly. Erik's death seems to be a misunderstanding on Snorri's part due to an influence from the succeeding kings
Gautreks saga also makes Alrek and Eirík sons of Agni by Skjálf and co-kings and it was to them that the warrior Starkad fled after his slaying of King Vikar. Starkad served them first as a companions on their viking expeditions and then, after Alrek and Eirík had settled down, went on further Viking expeditions alone.
But King Alrek had a short life, for Eirík struck Alrek dead with a bridle when they were out to train their horses and then ruled as sole ruler over Sweden. This version says that Eirík reigned for a long time as told in Hrólfs saga Gautrekssonar (Saga of Hrólf son of Gautrek).
This second saga introduces Thornbjörg, the daughter of King Eirík and Queen Ingigerd, who was a skillful shieldmaiden and ruled over part of the kingdom. Thornbjörg even called herself King Thorberg. But eventually she fell in love with Hrólf son of Gautrek and agreed to marry him, at which point she gave up her weapons to her father King Eirík and took up embroidery.
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