 His son Willem Hendrijk Vorstius (d. 1 October 1652), who studied rabbinical literature, was Remonstrant preacher at Leiden after 1642, and was also suspected of Socinianism.Another son, Guernerus (died March 1682), was also a Remonstrant preacher at Dokkum in 1632, but was banished for five years in 1634.In the following year he returned, only to be arrested and rebanished again, after which he was a preacher at Hoorn (1641), Leiden (1653), and Rotterdam (1658), where he became pastor emeritus in 1680.