Ammon, Amun, Ammonas, Amoun (Ἀμοῦν), or Ammonius the Hermit was a 4th-century Christian ascetic and the founder of one of the most celebrated monastic communities in Egypt. He was subsequently declared a saint. He was one of the most venerated ascetics of the Nitrian Desert, and Athanasius of Alexandria mentions him in his life of Anthony the Great.