Isaura
Ancestry: The Isaura, sometimes referred to as Isaurians or Isauriotes or Sur, are an ethnic group dominant in Surestān. It is believed that the Isaura are a surviving subgroup of the Luwians, an ancient Anatolian people that were once common throughout Surestān prior to colonization and assimilated by the Greek cities and empires of classical antiquity, a process accelerated by the Grecophile Romans until the Persian shah Khosrow II destroyed the empire and diminished Hellenism east of the Aegean Sea. The remaining Greeks in the cities and countless other people including the Phrygians, Galatians and Armenians in addition to Slavic and even Turkish immigrants continued to be assimilated by the Isaura.
Language: Isaurian is the identifying language of the Isaura, spoken by an overwhelming majority of Surestān. It is a language isolate, a descendant of the Luwian language, itself belonging to the once-diverse Anatolian language family. Isaurian is stereotyped by its speakers and outsiders as "the oldest language in Asia Minor."
Like its ancestor, it seems to have been originally written in a cuneiform adopted from Mesopotamia though that would switch over to a modified adaptation of Greek script, ironic given the history between the Isaura and Greeks.
Region: The nucleus of Surestān is located north of the Taurus mountain range. The foothills of southern Asia Minor were labeled under Surestān. The destruction of countless Greco-Roman cities throughout Asia Minor granted the Isaura the opportunity to expand into lands once considered off-limits to them and assimilate remnants of the Roman population that wasn't killed, deported or made slaves by the Persian and Avars.
Religion: Little is known of Isaura mythology prior to their Christianization, compared to other cultures. It is presumed that they worshipped an Indo-European religion that would increasingly adopt Hellenic elements until St. Paul introduced Christianity during his travels. This was a multi-generational process that would be complete during the 3rd century AD by St. Konon the Gardener, patron saint of Surestān. The Isaura are noted to be a devout, traditional and church-going people. The Isaura have produced countless Christian figures such as Lallis Palaea, Tuvarsa Runtiya and Michael Kodissa, founder of the military order, The Knights of St. Konon of Bethany.
The capital Ourba was once home to a centuries-old Jewish community composed of Greek-speaking Roman Jews escaping from fierce persecutions initiated by the Avar khagans during the Dark Ages prior to their voluntary emigration to the Kingdom of Israel in the seventeenth century.
Population: 72,000,000
Culture: Isaura are stereotyped as an insular, violent mountain people by their neighbors, a tradition that dates back to the Emperor Zeno who was mis-characterized by the bigoted Roman aristocracy as a brutish barbarian, akin to the Goths that once dwelled in the Danube. If anything, they are friendly and cosmopolitan. The culture of the Isaura dates back several millenium, with its beginning with the Luwians, continuing throughout the Hellenistic and Roman periods and became completely transformed by the Christian religion and its proximity to Constantinople, now Konstangrad. It would be under the Euphemian Renaissance that (then) contemporary, medieval and ancient elements would be combined to form modern day Isaurian culture.
History: The first known mention of a distinct Isaurian people was during the Siege of Isaura by the Macedonian general and regent Perdiccas. The ancient Isaura refused to hand their capital to the Greeks and burnt it to the ground rather than submitting to the Macedonian war machine. The Romans would have similar difficulty, partially conquering them during the submission of the Cilician pirates plaguing Mediterranean trade. They would continue to be a menace throughout the centuries, raiding defenseless towns and villages until a Roman force would arrive and force them into submission before withdrawing and returning to their old habits. They even sheltered a Roman usurper during the Crisis of the Third Century.
Even when one of their own, Zeno, ascended to the purple, their predatory habits continued. It was only during Justinian's reign that they have become subdued. Had it not been for Khosrow II's invasion and conquest of the Roman Empire's eastern provinces, the Isaura would've disappeared as a distinct people like their linguistic cousins and their neighbors and became indistinguishable from Greek or Roman. The truth is that despite their Christianization, Hellenizing/Romanizing in every aspect but language and contributing several emperors and part of the famed Excubitores, the Isaura were treated no better than the barbarians who lived outside the Empire. Roman religious propaganda labelled the Isaura, proud orthodox Christians, as pseudo-schismatic due to their allegiance to the Patriarch of Antioch instead of the one in Constantinople.
An otherwise benign anti-tax revolt led by the peasant farmer Flavius Arrma in 595 and its subsequent, violent crushing under the emperor Maurice would lead to his successor Phocas having to deal with Isauria rebelling and encouraging the Persian shah Khosrow II to send reinforcements. Flavius Arma's younger brother, Flavius Trokombigremis was appointed as satrap of Surestān which initially composed of Old Isauria and southwestern Anatolia. Persian rule of Surestān would be short-lived, lasting only a century. The Gokturks would raze Ctesiphon to the ground and replace the Sassanids. Their rule never reached west of the Euphrates. Surestān/Isauria would proclaim independence, expanding their territory eastward in the eighth and ninth centuries.