Was a Dutch painter and lived in Hattem (Gelderland). He was married with Anna Henriette Gezina Verkade (Anna) Verkade, daughter of Ericus Gerhardus Verkade, founder of the Verkade factory. His son, Jan Voerman junior became a painter as well. Voerman Sr is known for his river IJssel landscapes.
In Hattem you can find the Museum Voerman with a collection of both painters.