Coins from Odrysian Kingdom
The Odrysian Kingdom was a state union of over 40 Thracian tribes and 22 kingdoms that existed between the 5th century BC and the 1st century AD. It consisted mainly of present-day Bulgaria, spreading to parts of Southeastern Romania (Northern Dobruja), parts of Northern Greece and parts of modern-day European Turkey.

The Odrysian kingdom had maintained continuity with its own kings, but broken up into several kingdoms (including Canite and Odrissae) by the early second century BC, until succumbing to complete Roman conquest in 146 BC. In 100 BC a Thracian kingdom was restored, possibly by a son of Beithys, one of the last kings of the Odrissae, it is not clear if it was a vassal of Rome or entirely independent. The Odrysian king was murdered by his wife and his kingdom was completely subjected to Rome in 46 AD.
Odrysian Kingdom
Rhoemetalces I was king of the Odrysian kingdom of Thrace from 12 BC to 12 AD, in succession to his nephew Rhescuporis I. He was a loyal ally to the first Roman Emperor Augustus.

Rhoemetalces I was a direct descendant of the Thracian King Cotys I, and the middle son of the earlier Thracian king Cotys IV. His younger brother was Rhescuporis II. When Cotys VII died about 48 BC Rhoemetalce...
Rhoemetalces II was a Client Ruler in association with his mother Antonia Tryphaena of the Odrysian kingdom of Thrace under the Romans from 18 to 38. On coinage his royal title is in Greek:ΒΑΣΙΛΕΥΣ ΡΟΙΜΗΤΑΛΚΑΣ or of King Rhoemetalces.

Rhoemetalces II and Tryphaena succeeded his paternal great-uncle Rhescuporis II, who had usurped the throne from Rhoemetalces II's father Cotys VIII. The ...
Rhoemetalces III was a King of the Thracians. He was the son of the Monarch Rhescuporis II. He in association with his cousin-wife Pythodoris II were client rulers of the Odrysian kingdom of Thrace under the Romans from AD 38 to 46, in succession to Pythodoris’ mother Tryphaena and her brother Rhoemetalces II.

Rhoemetalces III was murdered in 46, by insurgents or on the orders of his wi...