Antigonus III Doson
…III Doson was a half-cousin of his predecessor, Demetrius II Aetolicus. Doson's father was Demetrius the Fair (briefly king of Cyrene), the son of Demetrius Poliorcetes and his third wife, Ptolemaïs, daughter of Ptolemy I Soter and Eurydice, daughter of Antipater. As such, Demetrius the Fair was, on his father's side…