Guillaume Walter Brenner (born February 1, 1986 in Beauvais, France) is a naturalized Togolese football midfielder, who played for Alki Larnaca in the Cypriot First Division.
Brenner began his career with US Chantilly and joined after one year to the top youth Academy from FC Nantes. He played four years on youthside for FC Nantes. Additionally, he played one game for the reserve team and signed in July 2005 with CS Louhans-Cuiseaux. Brenner played 11 games and scored four goals for CS Louhans-Cuiseaux in the Championnat National. As a result of his play at CS Louhans-Cuiseaux, he signed a contract in January 2008 with II liga polska club Czarni Żagań. Brenner, after one year in Poland with Czarni Żagań, went back to France in December 2008 and signed for Olympique Noisy-le-Sec in the Championnat de France amateur- He left the club after a half year, in the Summer of 2009, to join Cyprus club Alki Larnaca FC.
The Quadroon French-born player debuted for the Togo national football team in 2006, he holds current seven international caps.