| Father | Eystein 1st "Fert" Halvdansson King of Vestfold and King of Norway and King of Thrandia (735 - 780) |
| Mother | Hildur (Hildi) Ericksdatter (735 - 760) |
| Sibling | Geva Eysteindatter Duchess of Westphalia, Raumerike and Gravin and Princess of Denmark ( - ) |
| Sibling | Harold Eysteinsson King of Haithabu ( - ) |
| Sibling | Halfdan "the Meek/the Milde/the Generous" Eysteinsson King in Vestfold ( - ) |