Eurydice I of Macedon in the context of "Sirras"

Perdiccas III (Greek: Περδίκκας Γ΄) was king of the Hellenic kingdom of Macedonia from 365 BC to 360 BC, succeeding his brother Alexander II.

Son of Amyntas III and Eurydice, he was a child when in 369 BC his brother Alexander II was killed by their brother-in-law Ptolemy of Aloros, who then ruled as regent. In 365 BC, Perdiccas killed Ptolemy and assumed government.

Ptolemy of Aloros (Ancient Greek: Πτολεμαῖος), was sent by King Amyntas III of Macedon as an envoy to Athens c. 375–373 BC. After Amyntas' death, he began a liaison with his widow, Eurydice. In 368 BC, he assassinated her son, Alexander II, in order to gain control of the throne. His actions were not well-regarded by the leading families of Macedon, who called in the Theban general, Pelopidas, to re-establish peace. As part of the peace settlement, Philip, Alexander II's younger brother, was taken as a hostage back to Thebes. As Alexander II's younger brother, Perdiccas III, was under-age when Alexander II was killed, Ptolemy of Aloros ruled as regent.

Ptolemy ruled as a regent for Perdiccas III until Perdiccas killed him in 365 BC.

Arrhabaeus (Greek: Ἀρραβαῖος) or Arrhibaeus may refer to:

• Arrhabaeus, the king of Lynkestis, who claimed Corinthian aristocratic (Bacchiadae) origin. He was the maternal grandfather of Eurydice I of Macedon, mother of Phillip II. Arrhabaeus revolted against his sovereign, king Perdiccas II of Macedon in 424 BC. Brasidas the Spartan helped Perdiccas against Arrhabaeus.
• Arrhabaeus, son of Aeropus of Lyncestis, a conspirator against Philip II of Macedon. He was executed, along with his brother Heromenes. His son Amyntas served as cavalry officer of Alexander the Great.
• Arrhabaeus, a nobleman from Pelagonia, the father of Menelaus of Pelagonia.