SOUTHERN HALO c. 1983
HALO (USA) - NORTHERN SEA (USA), by NORTHERN DANCER (CAN)

SOUTHERN LAW (USA) f. 1997
RED RANSOM (USA) - ELEGANCE (USA), by PROVIDENTIAL (IRE)

SOUTHLAND (USA) f. 1970
DELTA JUDGE (USA) - CONCERT STAR (USA), by

SOUVENIR (BRZ) f. 2006
FIRST AMERICAN (USA) - LOVELY REGINA (BRZ), by CANDY STRIPES (USA)

SOUVERAINE (BRZ) f. 1991
BARONIUS (BRZ) - GRACITEA (BRZ), by FELICIO (FR)

SOVEREIGN DANCER (USA) c. 1975
NORTHERN DANCER (CAN) - BOLD PRINCESS (USA), by BOLD RULER (USA)

SOVEREIGN PATH (GB) c. 1956
GREY SOVEREIGN (GB) - MOUNTAIN PATH (GB), by

SOY CAMPEONA (USA) f. 1993
SPEND A BUCK (USA) - WITCH CONNECTION (USA), by DANZIG CONNECTION (USA)

SOY SALTENA (ARG) f. 1977
SHEET ANCHOR (USA) - LA MANERA (ARG), by LACYDON (ARG)

SOYUS (BRZ) f. 1972
FELICIO (FR) - FIRST CLASS (BRZ) , by FORT NAPOLEON (FR)