UNISTA f. 1957
- , by

UNIVERSELLE (BRZ) f. 1998
BOOMING (FR) - LICENA (BRZ) , by DEREK (BRZ)

UNIVERSO (BRZ) c. 1926
NOVELTY (USA) - ENGEITADA (GB), by HIS MAJESTY (GB)

UNKNOWN HEIRESS (USA) f. 1971
BAGDAD (USA) - MEDICI (BRZ), by BOLD RULER (USA)

UNKNOWN LADY (USA) f. 1979
HOIST THE FLAG (USA) - UNKNOWN HEIRESS (USA), by BAGDAD (USA)

UNNA (ARG) f. 1956
CYRUS THE GREAT (GB) - UCRANIA (ARG), by

UNTITLED (IRE) f. 1976
VAGUELY NOBLE (IRE) - ARTISTS PROOF (USA), by RIBOT (ITY)

UP AND RUNNING (BRZ) c. 2008
OUR EMBLEM (USA) - MARIA MOLE (BRZ) , by MUCH BETTER (BRZ)

UP EARLY (BRZ) f. 0000
SUN AGAIN (USA) - P.T.BOAT (---), by

UP THE HILL f. 1938
- , by