siblings of Optimistic xx

half siblings maternal 2 half siblings paternal 77
  half siblings maternal (2)
  half siblings maternal (2)
  half siblings paternal (77)

half siblings maternal

broodmare Ibrox xx (Thoroughbred, 1956, from Big Game xx)

Ibrox xx
gender-female
1956

Big Game xx / Borealis xx

broodmare Maple Leaf XX (Arabian purebred, 1953, from Big Game xx)

Maple Leaf XX
gender-female
1953

Big Game xx / Borealis xx