Jacob Willemsz Delff the Younger (1619, Delft - 1661, Delft), was a Dutch Golden Age portrait painter.
According to Houbraken he won a lucrative commission from the Delft vroedschap to repair his grandfather's schutterstuk after the Delft Explosion in 1654 damaged it.[1] This showed not only the respect the young man had for his grandfather, but also the value that the Delft council placed on their schutterstuk by him.[1]
According to the RKD his wedding portrait and the pendant of his wife were drawn from (now lost) paintings and are in the possession of the Leiden Library.[2] The schutterstuk that Arnold Houbraken mentioned is in the Delft city hall, in the room reserved for weddings.[2]