Saint Hilary of Poitiers

Saint Hilary
The Ordination of Saint Hilary. From a 14th-century manuscript.
"Malleus Arianorum" and the "Athanasius of the West;" Bishop, Confessor and Doctor of the Church
Born	c. 310 AD Pictavium, Gaul (modern-day Poitiers, France)
Died	c. 367 Poitiers
Venerated in	Roman Catholic Church Eastern Orthodox Church Anglican Communion Lutheran Church Oriental Orthodoxy
Canonized	Pre-Congregation
Feast	13 January 14 January (in some local calendars and pre-1970 General Roman Calendar)

Hilary (Hilarius) of Poitiers (c. 310 – c. 367) was Bishop of Poitiers and is a Doctor of the Church. He was sometimes referred to as the "Hammer of the Arians" (Latin: Malleus Arianorum) and the "Athanasius of the West." His name comes from the Latin word for happy or cheerful. His optional memorial in the General Roman Calendar is 13 January. In the past, when this date was occupied by the Octave Day of the Epiphany, his feast day was moved to 14 January.

Hilary was born at Poitiers either at the end of the 3rd or beginning of the 4th century A.D. His parents were pagans of distinction. He received a good pagan education, which included a high level of Greek. He studied, later on, the Old and New Testament writings, with the result that he abandoned his Neo-Platonism for Christianity, and with his wife and his daughter (traditionally named Saint Abra), was baptized and received into the Church.

The Christians of Poitiers so respected Hilary that about 350 or 353, they unanimously elected him their bishop. At that time Arianism threatened to overrun the Western Church; Hilary undertook to repel the disruption. One of his first steps was to secure the excommunication, by those of the Gallican hierarchy who still remained orthodox Christians, of Saturninus, the Arian Bishop of Arles, and of Ursacius and Valens, two of his prominent supporters.

...
Wikipedia