Eyvindr was the son of Berle-Kari but his mother is unknown. The date and place of his birth have not been found.
His wife was Sigrid de Sandes, who he married in 1001. The place has not been found. Their two known children were Finn (?-?) and Geirlaug (?-?).
Note 1
Like his brother Olvir, Eyvind joined his nephew Thorolf Kveldulfsson on a number of viking expeditions after the latter received a longship as a gift from his father Kveldulf. They gained a great deal of profit from such voyages.
Note 2
Eyvind is thereafter not mentioned until the death of Thorolf at the hands of King Harald (c. 900), at which time he administered to those wounded in the battle. Eyvind assisted Thorolf's widow Sigrid in administering her estates.