Jakob Willemsz. Delff
Jacob Willemsz. Delff and Jakob Willemsz. Delff is the name of the following people:
- Jacob Willemsz. Delff (the Younger) (1619–1661), Dutch painter and civil servant
- Jakob Willemsz. Delff (the Elder) (~ 1550–1601), Dutch painter and engraver