Jacques Malbrancq or Malbrancque, also known as Jacobus Malbrancq or Jacobi Malbrancq (born circa 1579 in Saint-Omer - died in 1653 in Tournai, in what is now Belgium), Father, Audomarensis, e Societate Jesu, was a Jesuit priest in the Southern Netherlands, professor and preacher at Saint-Omer Jesuit college. He is known for his extensive work on the Morini, a gallic tribe.
His book, De morinis et morinorum rebus, written in Latin, was published in Tournai, and contains three tomes.