siblings of Sweetheart xx

half siblings paternal

stallion Luke McLuke xx (Thoroughbred, 1911, from Ultimus xx)

Luke McLuke xx

stallion High Time xx (Thoroughbred, 1916, from Ultimus xx)

High Time xx

broodmare Possible xx (Thoroughbred, 1920, from Ultimus xx)

Possible xx

stallion Supremus xx (Thoroughbred, 1922, from Ultimus xx)

Supremus xx

broodmare Summit xx (Thoroughbred, 1918, from Ultimus xx)

Summit xx

stallion Scotch Broom xx (Thoroughbred, 1920, from Ultimus xx)

Scotch Broom xx

broodmare Aragonesa xx (Thoroughbred, 1913, from Ultimus xx)

Aragonesa xx

broodmare Bonnie Mary xx (Thoroughbred, 1917, from Ultimus xx)

Bonnie Mary xx

broodmare Last Straw xx (Thoroughbred, 1918, from Ultimus xx)

Last Straw xx

broodmare Look Up xx (Thoroughbred, 1922, from Ultimus xx)

Look Up xx

broodmare Heeltaps xx (Thoroughbred, 1927, from Ultimus xx)

Heeltaps xx

stallion Stimulus xx (Thoroughbred, 1922, from Ultimus xx)

Stimulus xx