Petronille de Chemillé, abbess of Fontevrault
Venerable Petronilla of Chemillé (died 24 April 1149) was the first abbess of the double monastery of Fontevrault in western France, which she headed from 1115 to 1149 following her second widowhood.

Born Petronilla of Craon, she became a follower of Robert of Arbrissel, himself a Beatified. After Philippa of Toulouse persuaded her husband, William IX, Duke of Aquitaine, to grant Robert land for the foundation of an abbey, Robert left both Hersende de Champagne and Petronilla in charge of monitoring the construction and organization. A year before Robert's death, he named her first abbess.