Geertruid was the daughter of Gijsbert van Deest and Agnes van der Marck. The date and place of her birth have not been found.
Her husband was Hendrik de Groeff van Erkelens. They were married, but the date and place have not been found. Their four known children were Geertruid (?-?), Anna (?-?), Maria (?-?) and Gijsbert (?-?).