Catholic Encyclopedia - St. Euphrosyne, according to the Vitae Patrum, passed as a man and lived in a men's monastery for 38 years. She died in about 470. www.newadvent.org/cathen/05606c.htm
For All the Saints - Short essay on St. Euphrosyne casts doubts on her existence. users.erols.com/saintpat/ss/0101.htm#euph
