Joan Hendrik Smidt van Gelder (6 April 1887, Amsterdam - 3 June 1969, Rheden) was the director of the children's hospital in Arnhem, the Netherlands. He was the son of Van Gelder Zonen paper manufacturer Pieter Smidt van Gelder (1851-1934) owner of van de Vereenigde Koninklijke Papierfabrieken der firma Van Gelder Zonen, and Maria Cornelia Kaars Sijpesteijn. Joan Smidt van Gelder Studied Medicine at Rijks Universiteit Leiden, and lived at Breestraat 144, in Leiden. After an arrest warrant was issued by the German occupied forces for his arrest, his home at the Velperweg in Arnhem was commandeered by the Ortskommandantur. His brother Pieter Smidt van Gelder also was an avid art collector.