Pythius
Pythius is a Lydian mentioned in book VII of Herodotus' Histories, chh. 27-29 and 38-39. He is the son of Atys, and the grandson of Croesus, the last native king of Lydia before the Persian conquest.
Xerxes I of Persia, son of Darius I of Persia, and king of Persia, encounters Pythius on his way to invade Greece c. 480 BC. Pythius entertains him and offers to provide money for the expenses of war. This Xerxes politely declines, and instead rewards Pythius' generosity by giving him 7000 gold Darics in order that his fortune might be an even 4,000,000 (ch. 29).