Saint Jonilla suffered with Saints Speusippus, Eleusippus, Meleusippus, and their grandmother Saint Leonilla, with Neon and Turbo in Gaul (by another account, in Cappadocia) in the second century, during the persecution under Marcus Aurelius (161-180). Saint Leonilla was beheaded with a sword after her grandchildren were tortured and slain.
Saint Jonilla saw the steadfast faith of the holy martyrs and said that she too was a Christian. The torturers hung her up by the hair, lacerated her body, then beheaded her. She left behind her husband and young son.