Cylaces

Cylaces or Glak was a 4th-century Armenian eunuch who occupied the office of "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. In 370, he sent messengers to Shapur II, promising him to betray the Armenian king Pap (). However, this ploy was discovered by Pap, who had Cylaces assassinated.