He entered the army of Henry IV., and served in Brittany under Jean d'Aumont, Francois de St Luc and Charles de Brissac. When the army of the League was disbanded he accompanied his uncle, who had charge of the ships in which the Spanish allies were conveyed home, and on reaching Cadiz secured (1599) the command of one of the vessels about to make an expedition to the West Indies.
Other members of the family who attained distinction in the same branch of learning were the two sons of Denis GodefroiDenis (1653-1719), also an historian, and Jean, sieur d'Aumont (1656-1732), who edited the letters of Louis XII., the memoirs of Marguerite de Valois, of Castelnau and Pierre de l'Estoire, and left some useful material for the history of the Low Countries; Jean Baptiste Achille Godefroy, sieur de Maillart (1697-1759), and Denis Joseph Godefroy, sieur de Maillart (1740-1819), son and grandson of Jean Godefroy, who were both officials at Lille, and left valuable historical documents which have remained in MS.
The family was of great antiquity, a Jean, sire d'Aumont, having accompanied Louis IX.
Jean d'Aumont, lieutenant-general to the king of France in the government of Burgundy, rendered important services to Louis XII.
Another Jean d'Aumont (d.
Louis Marie Augustin, duc d'Aumont (1709-1782), was a celebrated collector of works of art.
Louis Marie Celeste d'Aumont, duc de Piennes, afterwards duc d'Aumont (1762-1831), emigrated during the Revolution and served in the army of the royalists, as also in the Swedish army.