Attalus (in Greek Άτταλος, c. 390 BC – 336 BC), important courtier of Macedonian king Philip II of Macedonia. In 339 BC, Attalus' niece Cleopatra Eurydice married king Philip II of Macedonia. In spring of 336 BC, Philip II appointed Attalus and Parmenion as commanders of the advance force that would invade the Persian Empire in Asia Minor. After Philip II had been assassinated and Alexander the Great had become king (October 336 BC), Cleopatra Eurydice, her two children, and Attalus were all killed (Cleopatra Eurydice may have died by her own hand after the murders of her children).