Arrhidaeus older than Alexander?

[amyntoros]

I hadn't replied to this before now because I was hoping someone else might have an answer for you. All that Heckel in his Who's Who in the Age of Alexander the Great says is that "Arrhidaeus was born in 358 or 357", but he doesn't give a direct source for this information. He also notes that "Arrhidaeus was of marriageable age in 337/6 when Philip considered an alliance with Pixodarus". Now, I'm guessing here, but perhaps the thought is that if Arrhidaeus was younger than Alexander then he wouldn't have been considered old enough to be married off in 337/6?

Best regards,