Aeropus I of Macedon in Wikipedia

Aeropus I of Macedon (Greek: Ἀέροπος Αʹ ὁ Μακεδών), was the son of Philip I, the great-grandson of Perdiccas, the first king of Macedon, and the father of Alcetas. At the start of his reign, the Thracians and Illyrians were ravaging the country of Macedon, and had achieved a number of successful victories over the Macedonians. Eventually, despairing about their inability to achieve a victory over their enemies, and believing that they could only be victorious if they fought in the presence of their king, the army carried the infant Aeropus with them into battle. His presence stiffened the resistance of the soldiers, and they forced the Thracians and Illyrians to flee, eventually retreating entirely from Macedon. No further details of his reign are recorded.