Phyllis is a character in Greek mythology, daughter of a Thracian king (according to some, of Sithon; most other accounts do not give her father's name at all, but one informs that he was named either Philander, Ciasus, or Thelus). She married Demophon, King of Athens and son of Theseus, while he stopped in Thrace on his journey home from the Trojan War.