The family suffered tragically in the rebellion. Brother Charles Augustin was born on 9 March 1731 at Montaigu and became a French naval officer. Wounded fighting the British in the Battle of Ushant on 27 July 1778, he acquired the nickname "Bras-Coupé" (Arm-Off). He retired to his home in Chavagnes-en-Paillers. When the revolt broke out, the Vendeans asked Charles Augustin to lead them and he was killed in the fighting at La Guérinière on 19 March 1793. His nephew was Charles César, son of brother Charles Louis Royrand de Roussière and Thérèse Charlotte du Chaffault, daughter of Admiral Louis Charles du Chaffault de Besné. Charles César de Royrand and his wife Emile Louise Gabrielle de Suzannet emigrated to Brussels in 1791. He fled to the Dutch Republic and finally to England where he joined the emigre "Hector" Regiment as a sous-lieutenant. Taking part in the Expedition to Quiberon Charles César was captured and executed by the Republicans on 2 August 1795.