She was sired by Relko , the French - trained winner of the 1963 Epsom Derby .
Olwyn was a big , strong bay mare with a small white star bred in the United Kingdom by the Dollanstown Stud .
Olwyn was sired by Relko , the French - trained winner of the 1963 Epsom Derby .
Olwyn was a big , strong bay mare with a small white star bred in the United Kingdom by the Dollanstown Stud .