Daniel van Gelder was a son of Salomon van Gelder and Fogeltje de Lange. He was born on 3 March 1881 in Assen and married there on 17 August 1910 Judikje Troostwijk, who was born on 14 January 1880 in Leeuwarden as a daughter of Samuel Troostwijk and Doortje Troostwijk. The couple had two children, namely their daughter Fogeltje who was born in 1911 in Groningen and in 1913 there also their son Sa…