Where was the region at which Guillaume Plessis was born located? 
Guillaume Plessis: Guillaume Plessis (born 16 January 1985 in Saint-Denis, Réunion) is a footballer currently playing for the Greek side Lefkadia. Saint-Denis, Réunion:  It is located at the island's northernmost point, close to the mouth of the Rivière Saint-Denis.
island's northernmost point