Catholic Encyclopedia
St. Ammon, also called Amun or Amus. One of the desert fathers. Lived with his wife for 18 years as brother and sister, after which he became a hermit in Nitria and she also became a monk. Fourth-century Egypt.
For All the Saints
Brief paragraph on St. Ammon the Great.
The Ecole Glossary
Short biography of St. Ammonas, by Karen Rae Keck.