Fjolnir was the son of Yngvi-Frey Njordsson and Gerd Gymersdatter. The date and place of his birth have not been found.
His wife is not known. They were married, but the date and place have not been found. Their only known child was Svegdi (?-?).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | roi de Svitjod |