Jean Victor baron de Constant Rebecque (22 September 1773, in Genève – 12 June 1850, in Schönfeld (Silesia)) was a Swiss lieutenant-general in Dutch service of French ancestry. As chief-of-staff of the Netherlands Mobile Army he countermanded the order of the Duke of Wellington to evacuate Dutch troops from Quatre Bras on the eve of the Battle of Quatre Bras, thereby preventing Marshal Michel Ney from occupying that strategic crossroads.