The BBC reported her death at 104, closing a life that ran from clandestine service in occupied France to teaching and years spent alongside her husband in the overseas gendarmerie.
After the war she worked as a teacher. She followed her husband on his many postings as an officer of the gendarmerie in French overseas territories.
Her death removes one of the last living figures of the French Resistance, and one of the few women known to have both founded and commanded an anti-German unit.
The group was made up of deserters from German forced-labour programmes and of survivors from another Resistance outfit that the enemy had destroyed.
The following April, with the Allied invasion approaching, they took to the maquis. They lived clandestinely in the forested hills, supplied with food by local farmers.
She was a rare woman who, with her future husband, created and commanded her own unit of fighters against the German occupation.
Thirty men served under her orders. She organised sabotage operations, sheltered Allied airmen and joined the fight against the occupying German forces.
Among those they sheltered were two airmen, one American and one Canadian.
Alexandre later said she was very proud,"even if it is only a few weeks, or a few months, before I die.".