Syriac Orthodox Church's population is 5,600,000.
The population of Orthodox Church in America is 1,000,000.
Romanian Orthodox Church's population is 18,806,428.
The population of Polish Orthodox Church is 600,000.
Japanese Orthodox Church's population is 30,000.
Holy Qurbana or Qurbana Qadisha (ܩܘܪܒܢܐ ܩܕܝܫܐ qûrbānâ qadîšâ, pronounced qurbono qadisho in West Syriac), the "Holy Offering" or "Holy Sacrifice", refers to the Divine Liturgy as celebrated according to the Chaldean and Syriac Christian Rites, the former by the Syro-Malabar Church and the Assyrian Church of the East, and the latter by the Indian Orthodox Church, the Syriac Orthodox Church, Syro-Malankara Catholic Church, the Maronite Catholic Church and others which worship according to the Syriac tradition. The Syriac word Qurbana (also spelled as Kurbana) is cognate with the Hebrew word Korban.
The population of Estonian Apostolic Orthodox Church is 20,000.
The population of Ethiopian Orthodox Tewahedo Church is 45,000,000.
The population of Estonian Orthodox Church of Moscow Patriarchate is 150,000.
There was no such thing as east and west of Byzantine. The Byzantine Empire was not divided into east and west. Its official religion was Orthodox Christianity, which is sometimes also called Eastern Orthodox to distinguish it from the Oriental Orthodox Churches. The latter is an umbrella term for a number of Churches which hare separate from the mainstream Orthodox Churches found among the Egyptians, the Syrians and the Armenians (the Coptic Church, the Malankara Orthodox Syrian Church, the Syriac Orthodox Church, and the Armenian Apostolic Church).
Historically, Assyrians were polytheists, believing in the Mesopotamian Pantheon. The central god they revered was Marduk, but there were numerous others.Modern Assyrians are exclusively Christian (or Atheists from a Christian background). There are several Assyrian churches including the much older Chaldean Catholic Church, the Assyrian Church of the East, the Ancient Church of the East, the Syriac Orthodox Church, the Syriac Catholic Church, and some more recent Protestant denominations like the Assyrian Pentecostal Church and Assyrian Evangelical Church.
ܥܺܕܬܳܐ (is pronounced 'ídta)
There is an Orthodox Church and a Catholic Church. There is no Catholic Orthodox Church.