Frédéric Gaëtan de La Rochefoucauld, Marquis of Liancourt, the third son of François Alexandre Frédéric, duc de la Rochefoucauld-Liancourt, was a French nobleman who, during Napoléon's brief 1815 return to power, fled to Switzerland and tried to organise a volunteer army in support of the restored French monarchy of Louis XVIII. Wikipedia