Jakob van der Horst from Hoogeveen was a son of Philip van der Horst and Saartje Meiboom. He married Rosette Voorzanger on 24 December 1918 in Rotterdam, a daughter of Joseph Voorzanger and Heintje Springer. The couple had five children, among them a twin, of whom one girl, Hanna, died 26 December 1923, only 4 months old. His daughter Heintje, born in 1914 and married in 1938, presumably has survi…