| Honorific Prefix: | Saint |
| Agilus | |
| Birth Date: | c.580 |
| Birth Place: | Gaul (modern France) |
| Death Date: | c.650 |
| Death Place: | Rebais, France |
| Feast Day: | 30 August |
Saint Agilus (or Agilo, Ayeul, Aisle, Ail, Aile; c. 580–650) was a Frankish nobleman who became a Christian missionary in Bavaria and later was abbot of Rebais monastery near Paris, France.He was considered a saint, and his feast day is 30 August.
Saint Agilus or Ayeul was from a noble Frankish family, son of Chagnoald and descended from Pharamond and Frotmund.He was educated by Saint Columbanus in Luxeuil Abbey, France. He served as a missionary in Bavaria, Germany.According to tradition, Weltenburg Abbey in Bavaria was founded around 617 AD in the course of the Hiberno-Scottish mission by Agilus and Eustace of Luxeuil, two monks of Luxeuil Abbey.At the council of Clichy on 1 May 636 Agilus was made the first abbot of the Rebais monastery.He died in 650 AD.He was buried in the Saint-Jean church, which became the parish church of the town of Rebais.He was succeeded as abbot by his disciple Saint Filibert.
The hagiographer Alban Butler wrote,