Saint Yon

Who they were

Yon, in Latin Ionius or Aeonius, is a Catholic saint kept on 5 August. He is said to have been a disciple of Saint Denis of Paris.

He is remembered as having preached the faith in the country now called the Hurepoix, and in particular at Chatres, today Arpajon, where he is said to have built a church, and to have been martyred in the year 290 on the hill of the village that now carries his name. He is patron of Saint-Yon and second patron of Arpajon, and is shown with Saint Denis in the fresco of the basilica of Notre-Dame-de-Bonne-Garde at Longpont.

The miracles

There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.

Why that counted as sanctity

A companion of Saint Denis remembered as the first preacher of the Hurepoix.

Connected on this site

• Denis of Paris Saint
  “He is said to have been a disciple of Saint Denis of Paris.” — this site's research