Theodorus Moretus, also known as Theodor or Theodore Moretus (1602–1667) was a Flemish Jesuit priest who was also a mathematician, geometer, theologian and philosopher. He spent most of his working life in Prague and Breslau where he taught philosophy, theology and mathematics. He published a number of treatises on these three subjects and also on physics and music theory.

François d'Aguilon was a Jesuit, mathematician, physicist, and architect from the Spanish Netherlands.