descendants of Princess Olwyn xx

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stallion Heroic's Double xx (Thoroughbred, 1935, from Heroic xx)

Heroic's Double xx
gender-male
1935

Heroic xx / Tressady xx

horse Valfred xx (Thoroughbred, 1927, from Valais xx)

Valfred xx
gender-male
1927

Valais xx / Tressady xx