Hi! I have some names starting with the letter "U" to propose :
Urbinus : a city in Marche. It was a celtic-marche city in the northern part of Italy. It was conquest by the romans and renamed Urvinum Mataurense. It was an influent city in the art of Renaissance.
Uranus : the roman equivalent of Ouranos. He is the primordial god of the sky in the greek and roman mythology. He is with Gaia the common ancester of all the other gods
Urania : daughter of Zeus and Mnemosyne. She is the Muse of astronomy.
Ulysses : no description needed.