# Euthydemus I

_Bactarian King_

Canonical: https://diginpl.com/people/euthydemus-i
Last updated: 2026-11-03

> Euthydemus I was a Greco-Bactrian king and founder of the Euthydemid dynasty. He is thought to have originally been a satrap of Sogdia, who usurped power from Diodotus II in 224 BC. Literary sources, notably Polybius, record how he and his son Demetrius resisted an invasion by the Seleucid king Antiochus III from 209 to 206 BC. Euthydemus expanded the Bactrian territory into Sogdia, constructed several fortresses, including the Derbent Wall in the Iron Gate, and issued a very substantial coinage.

## Quick facts

- **Place of birth:** Ancient Magnesia ([Wikidata](https://www.wikidata.org/wiki/Q362604#P19))
- **Place of death:** Bactria ([Wikidata](https://www.wikidata.org/wiki/Q362604#P20))
- **Occupation:** sovereign ([Wikidata](https://www.wikidata.org/wiki/Q362604#P106))
- **Positions held:** King of Greco-Bactrian kingdom ([Wikidata](https://www.wikidata.org/wiki/Q362604#P39))

## Questions

**What positions has Euthydemus I held?**  
Positions held by Euthydemus I include: King of Greco-Bactrian kingdom.

## Related

- [Heliocles I](https://diginpl.com/people/heliocles-i)
- [Agathocles of Bactria](https://diginpl.com/people/agathocles-of-bactria)
- [Diodotus I](https://diginpl.com/people/diodotus-i)
- [Demetrius I of Bactria](https://diginpl.com/people/demetrius-i-of-bactria)
- [Diodotus II](https://diginpl.com/people/diodotus-ii)
- [Eucratides I](https://diginpl.com/people/eucratides-i)

## Sources

- [Wikipedia (English): Euthydemus I](https://en.wikipedia.org/wiki/Euthydemus_I) — [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
- [Wikidata item Q362604](https://www.wikidata.org/wiki/Q362604) — [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/)
- [Image: AgathoklesCoinWithEuthydemusTheou.JPG by PHGCOM (CC BY-SA 3.0)](https://commons.wikimedia.org/wiki/File:AgathoklesCoinWithEuthydemusTheou.JPG)

## Licence and attribution

Text from the Wikipedia article Euthydemus I, licensed under CC BY-SA 4.0. This page's text is shared under the same licence. Facts from Wikidata (CC0). Image: AgathoklesCoinWithEuthydemusTheou.JPG — PHGCOM, CC BY-SA 3.0.

## Cite this page

"Euthydemus I". DigiNepal. Last updated 3 November 2026. https://diginpl.com/people/euthydemus-i. Retrieved 10 November 2026.