An is a short girl's name, since girls are usually named when they are babies and all babies are short.
The most famous of all was An of England. By shrewd realty dealing, she traded what is now Manhattan for the crown jewels, reported to be worth $24 at the time. Now with a crown, she was immediately qualified to be ruler and she took the throne of Great Britain in 1707. Ambitious and vain, she lengthened her name to Queen An, then Queen Ann, then Queenie Anne. It was only when she started demanding to be called Queeneeneenie Annie Bannanie Banna Bo Banny Fee Fi Fo Fanny that there was a general uprising that led to her removal.