Little is known of St. Delphinus before his elevation to the episcopate. He assisted at the Council of Saragossa, in 330, in which the Priscillianists were condemned, and also at the Council of Bordeaux, which condemned the same schismatics.
He baptized St. Paulerius in 388, and the latter, in several letters, speaks of him as his father and his master. St. Delphinus died on the 24th of December, 403.
Lives of the Saints, by Alban Butler, Benziger Bros. ed.