Mechthild was the daughter of unknown parents. The date and place of her birth have not been found.
She died after 1300. The place is not known.
Her husband was Johann I von Heinsberg-Löwenberg. They were married, but the date and place have not been found. Their only known child was Sophia (?-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | AFT 1300 |
|