Y. The letter Y was borrowed from the Greek alphabet in the time of Cicero in order to express more precisely the sound of Upsilon. Its introduction into the Latin alphabet was prior to that of Z, as shown by the arrangement of the final letters V X Y Z (Isaac Taylor, The Alphabet, vol. ii., p.142.) This letter may be found on denarii of the Quinctia (B.C. 104), Vibia (B.C. 90), and Poblicia (B.C. 79) gentes (Mommsen, Mon. Rom., vol. ii., pp. 177, 378, 417, 466.)