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Catholic Encyclopedia
http://www.newadvent.org/cathen/08256b.htm
St. Ives, or Yves, patron saint of lawyers, d. 1303.
For All the Saints
http://www.saintpatrickdc.org/ss/0519.htm#ybus
Brief biography of St. Ivo Hélory, also known as St. Ybus.
Patron Saints Index
http://www.catholic-forum.com/saints/sainti08.htm
Profile of St. Ivo of Kermartin, also known as Yvo of Helory. Illustrated.