Vorstius or Vorst is a Dutch and German surname, a Latinized from of "Vorst". Notable people with the surname include: Aelius Everhardus Vorstius (1565-1624) Dutch physician, botanist and professor at Leiden University Conrad Vorstius (1569–1622) German-Dutch heterodox Remonstrant theologian, and professor of theology at Leiden University. Adolphus Vorstius (1597–1663) Dutch physician and botanist, son of Aelius Everhardus

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