Ptolemy II Philadelphus (Greek: Πτολεμαῖος Φιλάδελφος, Ptolemaîos Philádelphos" 309 BCE – 246 BCE) was the king of Ptolemaic Egypt from 283 BCE to 246 BCE. He was the son of the founder of the Ptolemaic kingdom Ptolemy I Soter and Berenice, and was educated by Philitas of Cos. He had two half-brothers, Ptolemy Keraunos and Meleager, both of whom became kings of Macedonia (in 281 BCE and 279 BCE respectively). Both died in the Gallic invasion of 280–279 BCE (see Brennus).