Cylaces

Cylaces or Glak ({{Langx|xcl|Գղակ|translit=Głak}}, misspelled {{Langx|xcl|Դղակ|translit=Dłak|label=none}} in the manuscripts of Faustus of Byzantium's history) was a 4th-century Armenian eunuch who occupied the office of {{Transliteration|xcl|hayr-mardpet}} (grand chamberlain). He initially defected to the Sasanian side during Shapur II's invasion of Armenia, but later rejoined the Armenians in 368 and fought Shapur II's forces.{{sfn|Lenski|2002|p=171}} In 370, he sent messengers to Shapur II, promising him to betray the Armenian king Pap ({{reign|370|374}}). However, this ploy was discovered by Pap, who had Cylaces assassinated.Faustus of Byzantium, History of the Armenians, Book Five, Chapter 6{{sfn|Syvanne|2015|p=148}}

In Faustus of Byzantium's History of Armenia, Cylaces is split into two characters, both of whom are executed on Pap's orders: an unnamed {{Transliteration|xcl|hayr-mardpet}} who is executed for insulting Pap's mother Parandzem, and another one named Glak who is executed for conspiring with the Persians.