Willem was the son of unknown parents. The date and place of his birth have not been found.
He died after 1264. The place is not known.
His wife was Heilwig von Altena, who he married in 1224. The place has not been found. Their only known child was Willem III (c1240-1304).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | AFT 1264 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | heer van Hoorne, Altena en Cortessem |