Susan de la Poer Beresford was the daughter of John Henry de la Poer Beresford, the 5th Marquess of Waterford and Lady Blanche Elizabeth Adeliade Somerset.
She was born on 30th April 1877 and married the Hon. Hugh Dawnay on 28th April 1902. She is pictured above with her horse on 15th December 1900 at Mayfield House, Portlaw, Co. Waterford.
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