Hermenegild

Saint Hermenegild or Ermengild (d. April 13, 586) (Spanish: San Hermenegildo, from Gothic Ermen Gild, "immense tribute"), was the son of king Leovigild of Visigothic Spain. He fell out with his father in 579, then revolted the following year. During his rebellion, he converted from Arian Christianity to Roman Catholicism. Hermenegild was defeated in 584, and exiled. His death was later celebrated as a martyrdom due to the influence of Pope Gregory the Great's Dialogues, in which he portrayed Hermenegild as a "Catholic martyr rebelling against the tyranny of an Arian father."