a Dutch Golden Age engraver and painter. Delff was born and died in Delft. He learned painting from his father, Jacob Willemsz Delff the Elder, who painted a family portrait with his sons and wife Maria Joachimsdr Nagel. Jacob's sons were all artists in their own right; Cornelis (top left in the portrait) became a still life painter, while Rochus (between Cornelis and his father) became a portrait painter like his father. Willem married a daughter of Michiel Jansz van Mierevelt and became a renowned engraver. His son Jacob Willemsz Delff the Younger became a painter.
