https://en.wikipedia.org/wiki/Indo-Parthian_Kingdom

As seen on 25.06.2019

The Indo-Parthian Kingdom, also known as the Suren Kingdom,^[1] was a Parthian kingdom founded by the Gondopharid branch of the House of Suren, ruling from 19 to c. 240. At their zenith, they ruled an area covering parts of eastern Iran, various parts of Afghanistan and the northwest regions of the Indian subcontinent (parts of modern Pakistanand northwestern India).

Gondophares I and his successors

Gondophares I originally seems to have been a ruler of Seistan in what is today eastern Iran, probably a vassal or relative of the Apracarajas. Around 20–10 BC,^[4] he made conquests in the former Indo-Scythian kingdom, perhaps after the death of the important ruler Azes. Gondophares became the ruler of areas comprising Arachosia, Seistan, Sindh, Punjab, and the Kabul valley, but it does not seem as though he held territory beyond eastern Punjab.^[5] Gondophares called himself "King of Kings", a Parthian title that in his case correctly reflects that the Indo-Parthian empire was only a loose framework: a number of smaller dynasts certainly maintained their positions during the Indo-Parthian period, likely in exchange for their recognition of Gondophares and his successors. 

Some ancient writings describe the presence of the Indo-Parthians in the area, such as the story of Saint Thomas the Apostle, who was recruited as a carpenter to serve at the court of king "Gudnaphar" (thought to be Gondophares) in India. The Acts of Thomas describes in chapter 17 Thomas' visit to king Gudnaphar in northern India; chapters 2 and 3 depict him as embarking on a sea voyage to India, thus connecting Thomas to the west coast of India.

As Senior points out,^[8] this Gudnaphar has usually been identified with the first Gondophares, who has thus been dated after the advent of Christianity, but there is no evidence for this assumption, and Senior's research shows that Gondophares I could be dated even before 1 AD. If the account is even historical, Saint Thomas may have encountered one of the later kings who bore the same title.