Philippe d'Aquin born Mordekhaï Crescas (often Italianate in Judah Mordecai) (Carpentras, 1578 - Paris, 1650), was a French physician, hebraist, philologist and orientalist.
Son of a Jewish second-hand dealer, his original name was Mordekhaï Crescas (or Mardochée Cresque) and early in life, he left his native town to study medicine for a few years without ever obtaining a degree.
He was excommunicated from his religious community for having disregarded the obligation on Saturday and for this reason, went to Aquino, where he became converted to Catholic Church and changed his name to Philippe d'Aquin.
In 1617, d'Aquin was a witness for the prosecution in the trial against Concini, Marquis d'Ancre, and his wife Léonora Galigai in whose household he had occupied some subordinate position[1] for witchcraft and "Jewishness".
D'Aquin participated in the development of the polyglot Bible by Guy Michel Lejay, produced between 1628 and 1645, dedicating himself in particular to the writing of the New Testament in Hebrew.