Johann was the son of unknown parents. The date and place of his birth have not been found.
He died about 1240. The place is not known.
His wife was Adelheid von Dassel. They were married, but the date and place have not been found. Their two known children were Hedwig Johannsdotter (c1218-1266) and Cäcilie Johansdotter (?->1251).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | ABT 1240 |
|