Cotys II (Ancient Greek: Κότυς, Kotys) was a possible king of the Odrysians in Thrace in the late 4th or early 3rd century BC.
This is generally interpreted to mean that Cotys, not yet king, was the son of Seuthes III by a marriage earlier than that to Berenike (since their four sons did not include a Cotys or a Reboulas).
[1] Building on this interpretation of the evidence, a certain Gonimase (Gonimasē), wife of a Seuthes, buried in a tomb near Smjadovo,[2] has been proposed as Seuthes III's earlier wife and mother of Cotys and Reboulas.
One scholar conjectures that Cotys was an elder son of Seuthes III but did not live to succeed his father, dying during the siege of Callatis (Mangalia) in 310 BC.
[7] While it is likely that Cotys II was a Thracian ruler in this period, it is not possible to establish his precise relationship (chronologically and genealogically) to Seuthes III.