Saint Ildefonsus or Ildephonsus was a scholar and theologian who served as the metropolitan Bishop of Toledo for the last decade of his life. His Gothic name was Hildefuns. In the Ethiopian Orthodox Tewahedo Church he is known as Saint Dexius based on the Ge'ez translation of the legends about his life.
Although his writings were less influential outside of Hispania, Ildefonsus was canonised and remained a potent force in the peninsula for centuries. Spanish and Portuguese missionaries spread his words worldwide.