What is the main source of information about Indo-Greek rulers?

The Indo-Greek Kingdom, or the Graeco-Indian Kingdom, known historically as the Yavana Kingdom (Yavanarajya), was a Hellenistic kingdom covering various parts of Afghanistan and the northwest regions of the Indian subcontinent (parts of modern Pakistan and northwestern India), which existed during the last two centuries BC and was ruled by over 30 kings, Menander, being the most illustrious and successful.

Important Points

One of the masterpieces of archaeological evidence about the Indo-Greeks is the coins.

• There are coin finds of several dozen Indo-Greek rulers in India; exactly many is complicated to determine, because the Greeks did not number their kings, and the eastern Greeks did not date their coins.
• One of his coin types showing a bust and seated Heracles is known to have been imitated by the Tokharian nomads in the territory of Sogdiana.

Hence, we can say that Coins are the main source of information about Indo-Greek rulers.