Lady Louise FitzRoy born 1973; eldest child of James FitzRoy, Earl of Euston, and Clare FitzRoy, Countess of Euston (b. 1973) Parents Clare FitzRoy, Countess of Euston James FitzRoy, Earl of Euston Children Cristabel Vaughan Siblings Lady Emily FitzRoy Lady Isobel FitzRoy Lady Charlotte FitzRoy Henry FitzRoy, 12th Duke of Grafton Partners Charles Vaughan