 Duurkoop died in 1792; and his widow, Johanna Adriana Christina Duurkoop, remarried to Conraag Johnas, then moved to Japan for the latter's military career.The couple later returned to Batavia, where Conraag Johnas died in 1803.The estate of Tandjong West was inherited by descendants of Johanna Adriana Christina Duurkoop in 1838.