Isabelle was born about 1265, the daughter of unknown parents. The place is not known.
Her husband was Hardouin I de la Haye-Jouslain. They were married, but the date and place have not been found. Their only known child was Hardouin II (c1290-c1315).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1265 |
|