Another quite distinct sect or party is refuted by Marcus Eremita, who seems to have been a disciple of St. John Chrysostom. His book Eis ton Melchisedek, or according to Photius "Against the Melchisedekites", speaks of these new teachers as making Melchisedech an incarnation of the Logos (divine Word). They were anathematized by the bishops, but would not cease to preach. They seem to have been otherwise orthodox. St. Jerome (Ep. 73) refutes an anonymous work which identified Melchisedech with the Holy Ghost. About AD 600, Timotheus, Presbyter of Constantinople, in his book De receptione Haereticorum  adds at the end of his list of heretics who need rebaptism the Melchisedechians, "now called Athingani" (Untouchables). They live in Phrygia, and are neither Hebrews nor Gentiles. They keep the Sabbath, but are not circumcised. They will not touch any man. If food is offered to them, they ask for it to be placed on the ground; then they come and take it. They give to others with the same precautions.
The etymology of the word is not certain but a common cited one is that it's Greek, its meaning is "(the) untouchables" and is derived from a privative alpha prefix and the verb thingano, i.e. to touch.
The name athinganoi, later variant form of which is atsinganoi, came to be associated with the Romani people who first appeared in the Byzantine empire at the time and is the root word for "zigeuner" "tzigan" "tigan" "zingari" derogatory words use to describe members of the Romani people. It is still not clear if the athinganoi who were present in the 5th century in Europe were the Romani people of today.
- P.G., lxv, 1117.
- Cotelier, "Monumenta eccles. Graeca", III, 392; P.G., LXXXVI, 34.
- White, Karin (1999). "Metal-workers, agriculturists, acrobats, military-people and fortune-tellers: Roma (Gypsies) in and around the Byzantine empire". Golden Horn 7 (2). Retrieved 2007-08-26.
- Bates, Karina. "A Brief History of the Rom". Archived from the original on 2007-08-10. Retrieved 2007-08-26.
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- This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). Catholic Encyclopedia. Robert Appleton Company. 
- Joshua Starr: An Eastern Christian Sect: The Athinganoi. In: Harvard Theological Review 29 (1936), 93-106.
- Ilse Rochow: Die Häresie der Athinganer im 8. und 9. Jahrhundert und die Frage ihres Fortlebens. In: Helga Köpstein, Friedhelm Winkelmann (eds.), Studien zum 8. und 9. Jahrhundert in Byzanz, Berlin 1983 (= Berliner Byzantinistische Arbeiten, 51), 163-178.
- Paul Speck: Die vermeintliche Häresie der Athinganoi. In: Jahrbuch der Österreichischen Byzantinistik 47 (1997), 37-50.