Orthodox Tewahedo

Orthodox Tewahedo is the common and historical name of two Oriental Orthodox churches within the Christian Church. These are the predominant Orthodox denominations in Eritrea and Ethiopia.

Until 1959, the Orthodox Tewahedo churches were administratively part of the Coptic Church. The Ethiopian Orthodox Tewahedo Church was granted and its own Patriarch that year by Coptic Orthodox Pope Pope Cyril VI of Alexandria.

Following the independence of Eritrea from Ethiopia in 1993, the Eritrean Orthodox Tewahedo Church was made autocephalous by Pope Shenouda III of Alexandria and it officially separated from the Ethiopian Orthodox Tewahedo Church.

Tewahedo (Ge'ez: ተዋሕዶ^? täwaḥədo) is a Ge'ez word meaning "being made one" or "unified". This word refers to the Oriental Orthodox belief in the one single unified nature of Christ; i.e., a belief that a complete, natural union of the Divine and Human Natures into One is self-evident in order to accomplish the divine salvation of humankind. This is in contrast to the "two Natures of Christ" belief (unmixed, but unseparated Divine and Human Natures, called the hypostatic union) which is held by the Catholic Church and the Eastern Orthodox Church. According to the Catholic Encyclopedia article on the Henotikon, around 500 bishops within the Patriarchates of Alexandria, Antioch and Jerusalem refused to accept the "two natures" doctrine decreed by the Council of Chalcedon in 451, thus separating themselves from the main body of the Christian Church at the time, which would later itself split in two factions (Eastern Orthodox and Catholic) in the East–West Schism of 1054, although this later event was not about Christological views.

...
Wikipedia