siblings of Efficient xx

half siblings paternal

broodmare Title Seeker xx (Thoroughbred, 1961, from Princequillo xx)

Title Seeker xx

stallion Misty Flight xx (Thoroughbred, 1955, from Princequillo xx)

Misty Flight xx

stallion Prince Alert xx (Thoroughbred, 1963, from Princequillo xx)

Prince Alert xx

broodmare Jandy xx (Thoroughbred, 1949, from Princequillo xx)

Jandy xx

broodmare Lady o War xx (Thoroughbred, 1956, from Princequillo xx)

Lady o War xx

broodmare Firm Policy xx (Thoroughbred,  , from Princequillo xx)

Firm Policy xx

broodmare Princess Matoaka xx (Thoroughbred, 1956, from Princequillo xx)

Princess Matoaka xx

stallion Tambourine xx (Thoroughbred, 1959, from Princequillo xx)

Tambourine xx

horse Daylight Flight xx (Thoroughbred, 1957, from Princequillo xx)

Daylight Flight xx

horse Sweet Goddess xx (Thoroughbred, 1950, from Princequillo xx)

Sweet Goddess xx

broodmare Venice xx (Thoroughbred, 1958, from Princequillo xx)

Venice xx

horse Miss Proctor xx (Thoroughbred, 1963, from Princequillo xx)

Miss Proctor xx