a mediaeval ecclesiastic, flourished in the first half of the 12th century. he was son of Milon, and had St. Bernard for teacher. In 1113, on the death of St. Stephen, he became abbot of Citeaux, and here he gave shelter to Abclard, and became the mediator for the restoration of that great mediaval philosopher and theologian to papal favor. In 1148 Rainald was president of a general chapter of his order. He died Dec. 13, 1151. He published a Recueil (in eighty-seven chapters) on divers chapters of the Order of Citeaux, etc. See Gallia Christiana, vol. 4:col. 985; Histoire Litteraire de la France, 12:418; Kelmusat, Vie de Abelard, i, 251. — Hoefer, Nouvo. Biog. Generale, s.v.