Ouinsou was born on 21 September 1942 in
Grande-Saline,
Artibonite, Haiti. She was sometimes known by the surname Denis-Ouinsou or Denis epse Ouinsou. Ouinsou Ouinsou was educated at the Sœurs de la Sainte Trinité and Collège St. Pierre in Haiti. She studied an undergraduate degree in administration and social sciences at the
Université d'État d'Haïti. She then studied a postgraduate degree in law and a doctorate in private law at the
Paris-Panthéon-Assas University (commonly known as the University of Paris II) in Paris, France. Ouinsou became an Associate of Private Law in
Libreville, Gabon, in November 1985. before being called to the constitutional court. She was the second woman to preside over Benin's constitutional court, succeeding
Elisabeth Ekoué Pognon. Ouinsou was attacked at her home in 2005, but the attack was repelled by her security detail. After the
2007 Beninese parliamentary election, Ouinsou announced that authorities had "uncovered several irregularities, including attempts to stuff
ballot boxes, underage voting and pressuring of voters," but that the election of
Thomas Boni Yayi was valid. Ouinsou died on 2 March 2011 in
Cotonou, Benin, aged 68, following a
cardiac arrest. == Honours ==