For the similarly named Macedonian ruler, see Demetrius II of Macedon.
Demetrius the Fair or surnamed The Handsome (Greek: Δημήτριος ὁ Καλός, around 285 BC-249 BC or 250 BC), also known in modern ancient historical sources as Demetrius of Cyrene, was a Hellenistic king of Cyrene.
Demetrius was of Greek Macedonian descent. He was surnamed The Fair, because he was an attractive man. He was born and raised in Macedonia. Demetrius was named after his father and was the youngest of the children of King Demetrius I of Macedon and his wife, Ptolemais. Demetrius I married Ptolemais as his fifth wife around 287 BC/286 BC in Miletus, while this was Ptolemais’ first marriage. Demetrius was the only child born into the marriage as in 283 BC his father had died. From his father’s previous marriages, Demetrius had various paternal half siblings, who included king Antigonus II Gonatas, princess and later queen of the Seleucid Empire Stratonice of Syria.
Demetrius’ maternal grandparents were the first Greek-Egyptian pharaoh Ptolemy I Soter and noblewoman Eurydice. Among his maternal aunts were queen Arsinoe II of Egypt and among his maternal uncles were pharaoh Ptolemy II Philadelphus and Macedonian King Ptolemy Keraunos (Keraunos was Ptolemais’ full blooded brother). Among his maternal cousins were pharaoh Ptolemy III Euergetes. His paternal grandparents were Macedonian king Antigonus I Monophthalmus and noblewoman Stratonice, while his paternal uncle was the general Philip.