托勒密二世（与姐姐恋爱者） Πτολεμαίος ο Φιλάδελφος（前308年—前246年），埃及托勒密王朝的第二位法老（公元前285年—公元前246年在位）。托勒密一世（救主）之子，母亲为贝勒尼基一世。在前288年—前285年，他已经与父母共同治理埃及。

托勒密二世的外号是得自于他与自己的姐姐阿西诺亚二世结婚（这符合埃及自法老时代以来的惯例）。

托勒密二世原来的妻子是色雷斯公主阿西诺亚一世。但是，在阿西诺亚二世（她是阿西诺亚一世的后母）从色雷斯返回之后，也许是为了迎合埃及人的想法，托勒密二世抛弃了原配的王后并以企图谋杀丈夫的罪名将其流放。随后他与姐姐结婚并使他成为自己的共治者。

Ptolemy II Philadelphus (Greek: Πτολεμαῖος Φιλάδελφος, Ptolemaîos Philádelphos, 309–246 BCE) was the king of Ptolemaic Egypt from 283 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, who both became kings of Macedonia (in 281 BCE and 279 BCE respectively), and who both died in the Gallic invasion of 280–279 BCE. Ptolemy was first married to Arsinoë I, daughter of Lysimachus, who was the mother of his legitimate children; after her repudiation he married his full sister Arsinoë II, the widow of Lysimachus.