I was reading the following:
"The Assyrian Orthodox Church of Antioch and The Diocese of the Armenian Church of Iraq both fall under the Oriental Orthodox Church. The Oriental Orthodox Church split from the Eastern Orthodox Church (aka Greek Orthodox, or Chalcedonian Orthodox) in AD 459 based on disagreements at the Council of Chalcedon. "
Also an official website:
"The Assyrian Orthodox Church of the Virgin Mary has the distinction of being the first Syrian Orthodox Church established in the United States."
Is the usage Assyrian Orthodox popular among SOC?
The Ancient Church of the East has formally or informally utilized the name "Assyrian Orthodox" at some points in its existence and the name has certainly been used by others in reference to it in a way that has suggested that it was its official name. But, the name has also been applied to others.
The Syriac/Syrian Orthodox Church in North America (which also used Assyrian Apostolic Church and Western Assyrian Church as descriptors) fairly commonly (and even officially, at times) styled itself as "Assyrian Orthodox" until at least the 1950s. And, until 1999, one could still encounter it occasionally in a few of their parish names, e.g., St. Mary's Assyrian Orthodox Church in Worcester, MA, its second parish in the US. The change of that parish's name to St. Mary's Syrian Orthodox Church was the subject of much rancor
, resulted in the loss of some parishoners, and was finally effected only after the intervention of His Holiness Patriarch Mor Ignatius Zakka I Iwas, who had addressed the issue in an Encyclical
, almost 20 years earlier. I am fairly certain that the Assyrian Orthodox Church of the Virgin Mary in Paramus, NJ, successor to the first American Syriac parish (to which one of your quotes refers), is the only one in which the older styling is still extant. (The whole issue of "trustee" ownership played a part in this.)
In the late 19th and early 20th century, the Syriacs were initially loath to use "Syrian" as an identifier in the US because of concern that they would be confused with the Syrian (Antiochian) Orthodox, whose Catholic counterparts, we Melkites, were also most frequently termed "Syrian Catholics". (As the non-Chalcedonian Assyrians had virtually no presence in the US until much later than the Syriacs, there was little likelihood of confusion between those two groups.) Ultimately, the issue of who would use the designation "Syrian Orthodox Church of Antioch" was the subject of a civil court case between the two US hierarchs; the Syriacs won and, from that point onward, the Syrian (Rum) Orthodox had to be content with "Antiochian". A thesis done a few years ago at St. Vladimir's presents a nice summary of the history and the issues about the name, including reasons for their original assumption of "Assyrian" as an identifier. See: Syriac Orthodox Church in North America
There are still a couple of Syriac organizations that use "Assyrian", most notably Beth Suryoyo Assyrian
, which I believe is considered to be a somewhat controversial group (along the lines of some of the more outspoken Catholic and Orthodox lay organizations) - not actually involved in promoting dissent, but certainly outspoken on what it perceives as abuses of authority, etc.
(and there has been an ongoing, particularly nasty hierarchy-clergy-laity dispute
in the West Coast Syriac Orthodox diocese for some time now).
Also, either "Assyrian Orthodox" or "Orthodox Assyrians" was used by those Assyrians who came into communion with the Russian Orthodox
and, ultimately, were assimilated into ROCOR. They had one church surviving in Baghdad which one author reported as accepting RO "dogma", but neither its jurisdiction or liturgy, although at least some of them were, for a time, induced to abandon their own liturgical praxis and accept the Liturgy of Saint John Chrysostom in Syriac. See pages 11 and 12 of A History of the Chaldean Mass
Also, one Syriac site, which eludes me at the moment, makes reference to the fact that it is still the practice of the Armenian Apostolic Church to refer to the Syrian Orthodox as "Assyrian Orthodox".