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Catholic Encyclopedia
http://www.newadvent.org/cathen/06033c.htm
St. Felix of Valois, co-founder of the Order of the Holy Trinity for the Redemption of Captives, d. 1212.
For All the Saints
http://www.saintpatrickdc.org/ss/1120.htm#feli
Essay on St. Felix of Valois casts doubts on his existence.