Anak the Parthian was a Parthian noble who, according to the Armenian tradition, was the father of Gregory the Illuminator, who converted Armenia to Christianity in the early fourth century. Anak is said to have killed King Khosrov of Armenia at the incitement of the Sasanians, leading to his own murder and the extermination of his family, except for the child Gregory, who was saved and taken to Roman territory. The details and historicity of this account have been debated by historians.

Tiridates III, also known as Tiridates the Great or Tiridates IV, was the Armenian Arsacid king from c. 298 to c. 330. In the early 4th century, Tiridates proclaimed Christianity as the state religion of Armenia, making the Armenian kingdom the first state to officially embrace Christianity.