Saint Bilo (Welsh: Sant Belyau) was a 5th century saint and one of the 24 daughters of Brychan Brycheiniog.^[1] She founded a church in Llanfilo, which is now a village in the community of Felin-fach in Powys.^[2]

The head of a neighbouring tribe allegedly tried to abduct and rape her in an attempt to force her to marry him.^{[citation needed]}

Parts of her history are thought to have added to Milburgha's stories of Much Wenlock.^{[citation needed]}