Saint Hermengild (Subscribe)
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St. Hermengild
http://www.newadvent.org/cathen/07276a.htm
Biographical article in the Catholic Encyclopedia about Hermengild, the son of an Arian Visigothic king. Hermengild's mother and wife were Catholic, and he converted to Catholicism, and resisted Arianism. He was beheaded in 585.
St. Hermenegild, Martyr
http://www.ewtn.com/library/MARY/HERMENEG.htm
Hagiography, from Alban Butler's Lives of the Saints.