siblings of Royal Dutch xx

half siblings maternal 5 half siblings paternal 10

half siblings maternal

broodmare Duccia di Buoninsegna xx (Thoroughbred, 1920, from Bridge of Earn xx)

Duccia di Buoninsegna xx
gender-female
1920

Bridge of Earn xx / William the Third xx

broodmare Kopje xx (Thoroughbred, 1925, from Spion Kop xx)

Kopje xx
gender-female
1925

Spion Kop xx / William the Third xx

broodmare Sister Anne xx (Thoroughbred, 1926, from Son In Law xx)

Sister Anne xx
gender-female
1926

Son In Law xx / William the Third xx

stallion Spelthorne xx (Thoroughbred, 1922, from Spearmint xx)

Spelthorne xx
gender-male
1922

Spearmint xx / William the Third xx

stallion Christopher Robin xx (Thoroughbred, 1927, from Phalaris xx)

Christopher Robin xx
gender-male
1927

Phalaris xx / William the Third xx