Gelhouen (or Gheylouen), Arnauld
a Dutch theologian, was born at Rotterdam, and lived at the close of-the 15th century. He was canon of the Augustinian order, at the monastery of Volnert, where he died in 1442. He wrote a moral treatise, entitled Γνῶθισεαυτόν, Sive Speculum Conscientice (Brussels, 1476), which was the first book issued from the press of the Freres. de la Vie, who introduced the art of typography at Brussels. See Hoefer, Nouv. Biog. Generale, s.v.