a Dutch painter. He was Willem de Heusch's nephew, signing like his uncle, substituting an initial J for the initial G (of Guglielmo). He chiefly painted Italian harbour views. His pictures are now scarce. Two of his canvases, the "Ponte Rotto" at Rome, in the Brunswick Gallery, and a lake harbour with shipping in the Lichtenstein collection at Vienna, are dated 1696.
