Won is the homonym of one. It's also the past of win and the English spelling of the basic monetary unit of North and South Korea. 

Won comes from Old English and Germanic words meaning "strive" and "take possession of". Winning often involves getting a prize. If you won a single unit of currency in a smallest of all possible lotteries in Korea,  you might finding yourself getting to say you won one won. Or you'd be too underwhelmed to say anything at all. What do you think a won would get you in Seoul?