For the Romans, it's pretty obvious (The military eagle, Aquila)
For the Carthaginians, if I'm correct many coins minted by the said nation had that design (A horse and a palm tree)
For the Macedonians, the Verginian Sun is the Royal Ensign of the Royal Familly.
For the Lusitannians (From whose land, I descend)...I have no idea. >_>