siblings of Sonus xx

full siblings 1 half siblings maternal 2 half siblings paternal 277

half siblings maternal

stallion Horos xx (Thoroughbred, 1976, from Head of the River xx)

Horos xx
gender-male
1976

Head of the River xx / Successor xx

broodmare Rapids xx (Thoroughbred, 1977, from Head of the River xx)

Rapids xx
gender-female
1977

Head of the River xx / Successor xx