Auguste Guy Guinement de Keralio (23 April 1715, parish of Saint-Germain, Rennes - rue de Condé, Paris, 1805) was a French nobleman and soldier. He was the brother of Louis-Félix Guynement de Kéralio and Agathon Guinement.
The son of the squire François Fiacre Guinement, seigneur de Keralio and of Marguerite Rose Bodin, Auguste entered the military academy in the citadel at Metz on 15 June 1732, aged just 17. He was made a lieutenant in the Carhaix battalion of the Brittany militia on 1 August 1733. He stayed in it until 8 February 1734, when he joined the régiment d'infanterie d'Anjou, in which his elder brother Felix François Guinement lost his life whilst serving as a lieutenant at the Siege of Philippsbourg on 18 July 1734.
Auguste saw action in the War of the Polish Succession - in May 1734 served at the battle at Colorno. He also fought at San Pietro before his regiment was sent to relieve the bataillon du Dauphin, then blockaded by Imperial forces at Secchia (18 September 1734). He fought at Guastalla on 21 September, where one of his contemporaries from the Metz military school, lieutenant Charles de Pagès, was seriously wounded. After the capture of Mirandole, Keralio was sent into winter quarters at San Secondo in the Duchy of Parma.
In 1735 he took part in the capture of the castles at Gonazgue, Reggiolo and Revere, for which he was made an aide-major on 29 August that year. He returned to France in September 1736. On 13 January 1741 he was made a captain and put in command of a company of the 2nd battalion of the régiment d'Anjou, fighting with them in the Bohemian theatre of the War of the Austrian Succession. As a capitaine aide-major, he was second-in-command to the regiment's colonel, the marquis d'Armentières, at Egra in June 1742, during the Siege of Prague. In 1747 de Belle-Ile put de Keralio in command of the Fourrages army depot in Marseille. In 1749 he left the army, but at the request of Louise-Élisabeth was later given the rank of 'colonel réformé' in 1757.