St. Susanna - Relates a pious story and then says at the end that she really was a martyr at Rome, but all of the details just given are fictitious. - http://www.catholic.org/saints/saint.php?saint_id=449
Catholic Encyclopedia - St. Susanna, virgin and martyr, beheaded in 295. Feast day is 11 August. - http://www.newadvent.org/cathen/14720a.htm