In Greek mythology, Thersander (Thersandros) was the son of Polynices and Argia and one of the Epigoni, the sons of the Seven against Thebes who launched a second expedition against the city to avenge their fathers' deaths. The campaign succeeded and Thersander became king of Thebes. He intended to fight for the Greeks in the Trojan War but was killed by Telephus in Mysia, where the Greeks had mistakenly landed before reaching Troy.
Adapted from Wikipedia, "Thersander (Epigoni)" · CC BY-SA 4.0
I.Family
Thersander was the son of Polynices and Argia (the daughter of Adrastus), making him a descendant of the Theban royal house through his father.
He was succeeded as king by his son Tisamenus, whose mother was Demonassa.
II.Mythology
Thersander was one of the Epigoni, the sons of the Seven against Thebes, who attacked the city of Thebes in retaliation for the deaths of their fathers in the earlier war that had attempted the same assault.
According to the tradition, Thersander may have bribed Eriphyle with the robe of Harmonia so that she would send her son Alcmaeon to fight alongside him. This mirrored the action of his own father, Polynices, who had used the necklace of Harmonia to persuade Eriphyle to send her husband, Amphiaraus, with the original attackers.
The attack of the Epigoni was successful, and Thersander became the king of Thebes. The poet Pindar refers to Thersander as gaining honor after the death of his father Polynices and as preserving the house of Adrastus for later generations.
III.Death
Thersander intended to fight for the Greeks during the Trojan War.
However, he was killed by Telephus before the war began, when the Greek expedition had mistakenly stopped in Mysia rather than reaching Troy.