Catholic Encyclopedia
St. Ildephonsus, archbishop of Toledo, d. 667.
Catholic Online
Short biography of St. Ildephonsus, known for his devotion to the Virgin Mary.
For All the Saints
St. Ildephonsus, Doctor of the Church, is also known as St. Alphonso, Ildefonsus, or Ildephonse.
The Ecole Glossary
Brief biography of St. Ildephonsus of Toledo, by Karen Rae Keck.