[1] Monin was born at Beauraing in the Duchy of Luxembourg in 1565.
He obtained the degree of Licentiate in Sacred Theology, and in 1592 was appointed a canon of Namur cathedral.
He went on to serve as rector of Jesuit colleges in Namur and Liège.
[2] Monin helped write the propers for the saints of the diocese of Namur in the Tridentine office issued for the diocese by Jean Dauvin as bishop of Namur in 1619.
[3] Gilles du Monin died 17 September 1624 while serving as spiritual prefect of a Jesuit house in Lille.