Arsaces (Armenian: Արշակ) was an Armenian Prince of the Arsacid dynasty of Armenia who lived in the second half of the 4th century and possibly first half of the 5th century. According to modern genealogies, Arsaces was a son born to the Armenian Monarchs Khosrov IV and Zruanduxt, while his brother was Tigranes. The father of Arsaces, Khosrov IV was an Arsacid Prince who was the first Armenian Monarch to serve as a Client King of Eastern Armenia under Sassanid rule who reigned from 387 until 389. His mother Zruanduxt, was a Sassanid Princess from Persia who was the sister of the Sassanid King Shapur III who reigned from 383 until 388.