Dotted lines indicate extra-marital relationships or adoptions.
Kings of Thebes are numbered with bold names and a light purple background.
Joint rules are indicated by a number and lowercase letter, for example, 5a. Amphion shared the throne with 5b. Zethus.
Regents of Thebes are alphanumbered (format AN) with bold names and a light red background.
The number N refers to the regency preceding the reign of the Nth king. Generally this means the regent served the Nth king but not always, as Creon (A9) was serving as regent to Laodamas (the 10th King) when he was slain by Lycus II (the usurping 9th king).
The letter A refers to the regency sequence. "A" is the first regent, "B" is the second, etc.
Deities have a yellow background color and italic names.
Upon the death of Cadmus, Pentheus, the son of Echion and Agave, the daughter of Cadmus, ruled Thebes for a short time until Dionysus prompted Agave to kill Pentheus. Polydorus then succeeded Pentheus as king of Thebes and married Nycteïs, the daughter of Nycteus. When their son Labdacus was still young, Polydorus died of unknown causes, leaving Nycteus as his regent.
In Pausanias's history, Polydorus' rule began when his father abdicated the throne and together with her mother Harmonia migrated to the Illyrian tribe of the Encheleans, but this is the only source for such a timeline.