[1] On the basis of circumstantial evidence, Medocus/Amadocus I has been identified as the son of Sitalces and a representative of the so-called "junior" branch of the Odrysian dynasty.
[5] At the time of the Battle of Aegospotami in 405 BC, the Athenian statesman and commander Alcibiades described the Thracian kings Medocus and Seuthes as his allies.
In the winter of 400/399 BC Seuthes II received the services of the Athenian commander Xenophon and his mercenaries.
Xenophon describes Medocus/Amadocus I as Seuthes I's overlord and protector, and records that he lived in the interior of the country, some twelve days from the coast.
[9] Medocus/Amadocus I introduced the "heraldic" device of a double-headed axe (labrys) on the coins of Odrysian rulers, continued on the issues of several members of his branch of the dynasty.