Among them were the Greek scholar Arnoldus Arlenius; the philologist Willem Canter; Johannes Heurnius, professor of medicine at Leyden university; the geographer Gerardus Mercator; the lawyer and friend of William of Orange, Elbertus Leoninus; the printer Lawrence Torrentinus, who became famous in Italy; and the well-known physician Johannes Wier, who disputed the belief in witchcraft as early as 1563.
Mnogi njegovi učenci, ki jih je kot učitelj v s-Hertogenboschu, Liegu in Utrechtu poučeval, so postali vplivni možje v vladi, znanosti in umetnosti.