João Poinsot (1589-1644) was a Dominican theologian of the commentator school, born in Lisbon of an Austrian father and a Portuguese mother, and briefly confessor to Philip IV of Spain. He was known as John of St. Thomas, Joannes a Sancto Thoma, though writers today refer to him as “Poinsot.” As Royal Confessor, he used his political influence at the Court of Madrid in favour of Louvain against the papal bull In eminenti which he believed was defective and based on false information. Poinsot protected the Doctors of the Faculty of Theology who were secular clergy, some of whom held a traditional Augustinian theology. His letter to John Schinckels (1581-1646) and the other Professors of the Faculty was written May 14, 1644, as a response to their Memorial in which they stated their case. Poinsot thought that the Augustinus of Cornelius Jansen was as a whole unfairly judged, even if part of it might be erroneous. He also believed the King of Spain had the right to make a better judgment pending clarification and that it was his duty to help the Pope make a deeper study of the issue. Therefore Poinsot advised the Court to withhold the place in this doctrinal matter. He died soon thereafter on June 17, 1644. This was still during the earliest phase before the pejorative name “Jansenist” had permanently stuck. A royal placet was required to promulgate papal bulls in the Spanish possessions, and it was delayed until years after Poinsot's death, partly due to his initial efforts.