Elsje Oudkerk, born on 7 October 1880 in Den Helder, was the eldest of the 7 children of Benjamin Oudkerk and Klaartje van Tijn. In 1882 she had a brother Hijman, who died in childhood on 15 May 1884. In October 1886 another Hijman was born who married Debora Elte; this Hijman survived the Holocaust with his wife and 2 children and died in 1972 in Amsterdam.
Hijman's sister Belo, who was born in D…