Wikipedia
In Greek mythology, Cisseus was a Thracian king and father of Theano, the wife of Antenor, as related in Homer's Iliad. His wife was Telecleia, a daughter of King Ilus of Troy.
No mythographer (Homer included) provides any further details about this Cisseus, although Strabo suggests that he was associated with the town of Cissus in western Thrace (later Macedonia). Hecabe ( Hecuba), the wife of Priam, is sometimes given as a daughter of Cisseus; but she is more usually described as a Phrygian, and daughter of King Dymas.
Cisseus is also the name of a local king, defeated by Macedonians, Perdiccas, Caranus and Archelaus in various versions of the myth.
Another Cisseus was a son of Aegyptus and Caliadne. He married and was murdered by Anthelea, daughter of Danaus and Polyxo.