Willem Jacobsz Delff ( 1580 - 1638 ) was a Dutch painter. Willem Jacobsz Delff s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 82.48 USD for of Johannes Stalpar in 2005 to 1344.57 USD for Bildnis des George Villiers, Herzog von Buckingham in 2019 , based on the size and medium of the artwork.