Ashtat Yeztayar was an Iranian military officer under what last great king of the Sasanian Empire, reigning from 590 to 628?
Khosrow II Khosrow II (Chosroes II in classical sources; Middle Persian: "Husrō(y)"), entitled "Aparvēz" ("The Victorious"), also Khusraw Parvēz (New Persian: خسرو پرویز ), was the last great king of the Sasanian Empire, reigning from 590 to 628.
Shapur I Shapur I (Middle Persian: 𐭱𐭧𐭯𐭥𐭧𐭥𐭩 ; New Persianاپور ), also known as Shapur I the Great, was the second "shahanshah" (king of kings) of the Sasanian Empire. The dates of his reign are commonly given as 240/42 – 270/72, but it is likely that he also reigned as co-regent (together with his father) prior to his father's death in 242 (more probably than 240).