1. Demetrius was the son of Greco-Bactrian ruler Euthydemus.
2. He was king of Macedonia from 294 to 288 BC.
3. Numismatic evidence proves that Demetrius issued bi-lingual square coins with Greek on the obverse and Kharosthi on the reverse.
4. Scholars are not able to decide which of the three, named Demetrius, was the initiator of the Yavana era, commencing for second century BC in India.
