The parish is named after Germanus of Auxerre in the fifth century. In the twelfth century, it belonged to the abbey of Saint-Florent de Saumur before being united to the diocese of Rennes XIV. The present church retains some elements of Romanesque tombstones of the previous building. Bertrand Saulnier (twelfth century), Pierre Loupvelaye (1550), Isaac Lachesnais (1590), Leonard Tréhu (1613), Valentin Chevetel (1706) and Pierre Pougeolle (1779) were rectors of the parish.