Ilona was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was István Kemény. They were married, but the date and place have not been found. They had no known children.
| Association | Relationship |
|---|---|
| Péter Kemény de Magyargyerõmonostor | son? |
| Mihály Kemény de Gyerőmonostor | son? |
| István Kemény de Magyargyerőmonostor | son? |
| Márta Kemény | daughter? |
| Anna Kemény | daughter? |
| Margit Kemény | daughter? |