Hermaeus Soter or Hermaios Soter (; epithet means "the Saviour") was a Western Indo-Greek king of the Eucratid Dynasty, who ruled the territory of Paropamisade in the Hindu-Kush region, with his capital in Alexandria of the Caucasus (near today's Kabul, Afghanistan). Bopearachchi dates Hermaeus to c. 90–70 BCE and R. C. Senior to c. 95–80 BCE. Biography Hermaeus seems to have been successor of Philoxenus or Diomedes, and his wife Kalliope () may have been a daughter of Philoxenus, according to Senior. Judging from his coins, Hermaeus' rule was long and prosperous, but came to an end when the Yuezhi, coming from neighbouring Bactria, overran most of his Greek kingdom in the Paropamisade around 70 BCE. According to Bopearachchi, these nomads were the Yuezhi, the ancestors of the Kushans, whereas Senior considers them Sakas. Kushan ruler Kujula Kadphises associated himself to Hermaeus on his coins, either in attempt to solidify legitimacy or due to the difficulties minting early coins. In any case, the Yuezhi-Kushans preserved a close cultural interaction with the Greeks as late as the 3rd century CE. Given the importance of Hermaeus to the nomad rulers, it is possible that Hermaeus himself was partially of nomad origin. Coins of Hermaeus Hermaeus issued Indian silver coins of three types. The first type has a diademed or sometimes helmeted portrait, with reverse of sitting Zeus making benediction gesture. Hermaeus also issued a rare series of Attic silver tetradrachms of this type, which were issued for export to Bactria. The second type was a joint series of Hermaeus with his queen Kalliope. The reverse departs from the traditional Hermaeus format, in that it shows the king on a prancing horse. The "king on a prancing horse" is characteristic of the contemporary Greek kings in the eastern Punjab such as Hippostratos, and it has been suggested that the coin represented a marital alliance between the two dynastic lines. The horseman on Hermaeus' version is however portrayed somewhat different, being equipped with a typical Scythian longbow. The third series combined the reverses of the first series, without portrait. Hermaeus also issued bronze coins with the head of Zeus-Mithras and a prancing horse on the reverse. Contacts with China A Chinese historical record from the Hanshu Chap. 96A could possible be related to Hermaeus, even though this is very speculative and the record more likely refers to later Saka kings. The chronicle tells how