jacob de gheyn iii, also known as jacob iii de gheyn (1596–1641), was a dutch golden age engraver, son of jacob de gheyn ii, canon of utrecht (city), and the subject of a 1632 oil painting by rembrandt. the portrait is half of a pair of pendent portraits. the other piece is a portrait of de gheyn's friend maurits huygens, wearing similar clothing (ruffs and black doublets) and facing the opposite direction