The characteristic of cynocephaly, or cynocephalus (/saɪnoʊˈsɛfəli/), having the head of a canid, typically that of a dog or jackal, is a widely attested mythical phenomenon existing in many different forms and contexts.
[11] Herodotus reports claims by ancient Libyans that such creatures inhabit the east of their lands, as well as headless men and various other anomalies.
According to the Coptic legend, preserved in an Arabic translation, the two "cynophali devoured the grandfather of St. Mercurius, and were preparing to eat his father when an angel appeared and surrounded them with a ring of fire.
[17][18] The cynocephali offered such an evocative image of the magic and brutality deemed characteristic of bizarre people of distant places that they kept returning in medieval literature.
[20] The roots of that iconography lie in a hagiographic narrative set during the reign of the Emperor Diocletian, which tell of a man named Reprebus, Rebrebus or Reprobus (the "reprobate" or "scoundrel") being captured by Roman forces fighting against tribes dwelling to the west of Egypt in Cyrenaica and forced to join the Roman numerus Marmaritarum or "Unit of the Marmaritae", which suggests an otherwise-unidentified "Marmaritae" (perhaps the same as the Marmaricae Berber tribe of Cyrenaica).
[21] It has also been speculated that this Byzantine depiction of St. Christopher as dog-headed may have resulted from a misreading of the Latin term Cananeus (Canaanite) as caninus, that is, "canine".
[22] The late 10th century German bishop and poet Walter of Speyer portrayed St. Christopher as a giant of a cynocephalic species in the land of the Chananeans (Canaan in the New Testament) who ate human flesh and barked.
They spread the rumor among the enemy that these men wage war obstinately, drink human blood and quaff their own gore if they cannot reach the foe.
"[26] At the court of Charlemagne, the Norse were given this attribution, implying un-Christian and less-than-human qualities: "I am greatly saddened" said the King of the Franks, in Notker's Life, "that I have not been thought worthy to let my Christian hand sport with these dog-heads.
Quoting St. Jerome, Thomas of Cantimpré corroborated the existence of Cynocephali in his Liber de Monstruosis Hominibus Orientis, xiv, ("Book of Monstrous men of the Orient").
The thirteenth-century encyclopedist Vincent of Beauvais acquainted his patron Saint Louis IX of France with "an animal with the head of the dog but with all other members of human appearance… Though he behaves like a man… and, when peaceful, he is tender like a man, when furious, he becomes cruel and retaliates on humankind".
The so-called Leges Edwardi Confessoris, written around 1140, however, offered a somewhat literal interpretation: “[6.2a] For from the day of his outlawry he bears a wolf's head, which is called wluesheued by the English.
Giovanni writes of the armies of Ögedei Khan who encounter a race of dogheads who live north of the Dalai-Nor (Northern Ocean), or Lake Baikal.
[37] In 1517, the Ottoman Sultan Selim I was presented with a map of the New World drawn by Piri Reis, which included an image of a dog-headed man fighting a monkey in what is now Colombia.
[39] According to Henri Cordier, the source of all the fables of the dog-headed barbarians, whether European, Arabic, or Chinese, can be found in the Alexander Romance.
[40] In his feature Giant Egg, David Attenborough speculates that the indri, a type of lemur from Madagascar, may be one possible origin to the myth of dog-headed men.
[citation needed] Additionally, in the Chinese record Book of Liang, the Buddhist missionary Hui Shen describes an island of dog-headed men to the east of Fusang, a nation he visited variously identified as Japan or the Americas.