Joseph Leendert van Gelder, miner in Oberhausen (Germany), was a son of Leendert Joseph van Gelder and Henderina van Vriesland. He married Rozetta van Gelder in Assen on 9 September 1903, a daughter of Salomon van Gelder and Folgeltje de Lange. The couple had five children: Fogeltje, Salomon, Hendrina, Leendert and Sander.
Joseph Leendert van Gelder was born in a family with ten children; one brot…