Regius was born in Utrecht, and was also known by his birth name, Hendrik de Roy, or by its French rendering, Henri Le Roy. He studied liberal arts at the University of Franeker and medicine at Groningen University, Leiden University, and subsequently at the Universities of Montpellier and Padua.
He died in Utrecht.
- The Correspondence between Descartes and Henricus Regius (in French, with commentary in English)
- Clarke, Desmond. "Henricus Regius". In Zalta, Edward N. Stanford Encyclopedia of Philosophy.
- The Mathematics Genealogy Project - Henricus Regius