"Philip III Arrhidaeus (Ancient Greek: Φίλιππος Γ΄ ὁ Ἀρριδαῖος; c. 359 BC – 25 December, 317 BC) reigned as king of Macedonia from after 11 June ...
323 BC until his death. He was a son of King Philip II of Macedon by Philinna of Larissa, and thus an elder half-brother of Alexander the Great. Named Arrhidaeus at birth, he assumed the name Philip when he ascended to the throne.
As Arrhidaeus grew older it became apparent that he had mild learning difficulties. Plutarch was of the view that he became disabled by means of an attempt on his life by Philip II's wife, Queen Olympias, who wanted to eliminate a possible rival to her son, Alexander, through the employment of pharmaka (drugs/spells); however, most modern authorities doubt the truth of this claim." - (en.wikipedia.org 11.08.2021)
