Jacob Wilemz Delff ( 1619 - 1661 ) was a Dutch painter. Jacob Wilemz Delff s works have been put up for auction numerous times, with realized prices varying from 3153.67 USD for Portrait of a gentleman, traditionally identified as the artist, bust-length, in black costume with a lawn collar in 2003 to 4507.39 USD for Portrait of a gentleman in 2006 , based on the size and medium of the artwork.