Hermenegild

Life and witness
At Seville, in Spain, of St. Hermenegild, son of Leovigild, an Arian, king of the West-Goths, who being cast into prison for confession of the Catholic faith, and refusing to communicate at Easter at the hands of an Arian bishop, by the command of his faithless father was beheaded, and so, for the loss of a temporal kingdom, entered into a heavenly, both a king and martyr.
Biographical overview
Saint Hermenegild or Ermengild (died 13 April 585; Spanish: San Hermenegildo; Latin: Hermenegildus, from Gothic 𐌹𐍂𐌼𐌿𐌽𐌰𐌲𐌹𐌻𐌳𐍃 *Airmana-gild, "immense tribute"), was the son of King Liuvigild of the Visigothic Kingdom in the Iberian Peninsula and southern France. He fell out with his father in 579, then revolted the following year. During his rebellion, he converted from Arianism to Catholicism. Hermenegild was defeated in 584 and exiled. His death was later celebrated as a martyrdom due to the influence of Pope Gregory I's Dialogues, in which he portrayed Hermenegild as a "Catholic martyr rebelling against the tyranny of an Arian father."
Martyrologium Romanum · Latin witness
Hispali, in Hispania, sancti Hermenegildi Martyris, qui fuit filius Leovigildi, Regis Visigothorum Ariani; atque ob catholicae fidei confessionem conjectus in carcerem, et, cum in solemnitate Paschali Communionem ab Episcopo Ariano accipere noluisset, perfidi patris jussu securi percussus est, ac regnum caeleste pro terreno Rex et Martyr intravit.
