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.)
A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890