Jon was born about 1300, the son of unknown parents. The place is not known.
His wife was Jorunn Bjørnsdotter Holter. They were married, but the date and place have not been found. Their two known children were Bjørn Jonsen (?-1377) and Gro Jonsdatter (?-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1300 |
|