Abraham Lootsteen was a son of Mozes Lootsteen and Katje Jas. He married in Amsterdam on 21 December 1898 to Roosje Zwart, a daughter of Jacob Zwart and Esther Groen.
The couple had six childrend, of whom one babydaughter just afther birth has died. The other five children: Kaatje, Esther, Mozes, Wi…