siblings of Fortress xx

half siblings paternal

broodmare Southdown xx (Thoroughbred, 1836, from Defence xx)

Southdown xx

broodmare Diversion xx (Thoroughbred, 1838, from Defence xx)

Diversion xx

broodmare Emerald xx (Thoroughbred, 1841, from Defence xx)

Emerald xx

broodmare Protection xx (Thoroughbred, 1845, from Defence xx)

Protection xx

stallion Defensive xx (Thoroughbred, 1831, from Defence xx)

Defensive xx

stallion The Emperor xx (Thoroughbred, 1841, from Defence xx)

The Emperor xx

broodmare Temper xx (Thoroughbred, 1834, from Defence xx)

Temper xx

stallion Tipple Cider xx (Thoroughbred, 1833, from Defence xx)

Tipple Cider xx

broodmare Young Specimen xx (Thoroughbred, 1840, from Defence xx)

Young Specimen xx

broodmare Deceitful xx (Thoroughbred, 1835, from Defence xx)

Deceitful xx

broodmare Defenceless xx (Thoroughbred, 1844, from Defence xx)

Defenceless xx

broodmare Enterprise xx (Thoroughbred, 1834, from Defence xx)

Enterprise xx