Career
First, he translated the Heidelberg Catechism into Dutch. Second, using the singing work of John Calvin,Theodore Beza, Peter Marot, and Louis Bourgeois, Datheen set the Psalms and psalter to verse and tune in Dutch (1566), though his settings were overshadowed by those of Philips Marnix van Street Aldegonde. Sixth, at this latter Synod he helped write, edit, and approve the long-revered Church Order (more famously known as the 1618-1619 Church Order of Dordt) with its 84 articles
Peter Datheen married a former Roman Catholic nun, Benedicta.
Together they had one daughter, Christiana.