siblings of Lambourn xx

half siblings maternal 2 half siblings paternal 5

half siblings maternal

horse Beaupartir xx (Thoroughbred, 1935, from Beau Pere xx)

Beaupartir xx
gender-male
1935

Beau Pere xx / Chief Ruler xx

broodmare Firstloch xx (Thoroughbred, 1950, from Balloch xx)

Firstloch xx
gender-female
1950

Balloch xx / Chief Ruler xx