Saint Mellonius was an early 4th-century Bishop of Rotomagus in the Roman province of Secunda Provincia Lugdunensis. He is known only from a 17th-century 'Life' of little historical value, meaning the

Saint Nicasius of Rouen, often known as the Apostle of the Vexin, was a 3rd-century saint and martyr in Gaul. He is sometimes considered the first Bishop of Rouen.