323 BC deaths

Alexander III of Macedon, most commonly known as Alexander the Great, was king of the ancient Greek kingdom of Macedon. He succeeded his father Philip II to the throne in 336 BC at the age of 20, and spent most of his reign conducting a lengthy military campaign throughout Asia and Egypt. By the age of 30, he had created one of the largest empires in history, stretching from Greece to northwestern India. He was undefeated in battle and is widely considered to be one of history's greatest and most successful military commanders.

Diogenes the Cynic (, ; ), also known as Diogenes of Sinope, was an ancient Greek philosopher during the period of Classical Greece, and one of the founders of Cynicism.

Daughter of Darius III, died 323 BC

Cynane (, Kynane or , Cyna or , Cynna; 357 – 323 BC) was half-sister to Alexander the Great, and daughter of Philip II by Audata, an Illyrian princess. She is estimated to have been born in 357 BC.

thumb|300px|The marriages of Stateira II to Alexander III of [[Macedon and her sister, Drypetis, to Hephaestion at Susa in 324 BC, as depicted in a late-19th-century engraving]]

Harpalus (Greek: Ἅρπαλος), son of Machatas, was a Macedonian aristocrat and childhood friend of Alexander the Great in the 4th century BC. Harpalus was repeatedly entrusted with official duties by Alexander and absconded with large sums of money on three occasions. Alexander appointed him treasurer of his empire in Babylon in 330 BC. In 324 BC he fled from Babylon to Athens with a large sum of money. The resulting political controversy in Athens ("the Harpalus Affair") was a contributing factor in the Lamian War.

Kalanos, also spelled Calanus () ( – 323 BCE), was an ancient Indian gymnosophist, a Brahmin sage , and philosopher from Taxila who accompanied Alexander the Great and was his teacher. He accompanied Alexander the Great to Persis and, after falling ill, immolated himself by entering a pyre in front of Alexander's army. Diodorus Siculus called him Caranus ().

Leosthenes (; died 323 BC) was an Athenian who was commander of the combined Greek army in the Lamian War. Leosthenes was the son of his namesake father Leosthenes who had suffered exile in 362/1 BC and who had fled to the court of Philip II. It is unknown by what means he had obtained the high reputation he had when he first makes his appearance in history. It has been inferred from a passage in Strabo, that he had first served under Alexander the Great in Asia; but it now seems certain that this is a mistake, and rather the reference should have been to Leonnatus.

4th-century BC Macedonian general