4. Son of Ptolemy Philadelphus by Arsinoe, the daughter of Lysimachus, king of Thrace.
He survived both his brother Ptolemy III. Euergetes, and his nephew, Ptolemy IV. Philopator; but was put to death by Sosibius, the minister and guardian of Ptolemy Epiphanes. (Schol. ad Theocr. Idyll.
17.128; Plb. 15.25