Lady Henrietta Somerset (1690-1726) (1690–1726) Parents Rebecca Child Charles Somerset, Marquess of Worcester Children Charles Henry FitzRoy, Earl of Euston Harriet FitzRoy Caroline Stanhope, Countess of Harrington Lord Augustus FitzRoy Isabella Seymour-Conway, Countess of Hertford Lord Charles FitzRoy George FitzRoy, Earl of Euston Siblings Henry Somerset, 2nd Duke of Beaufort Partners Charles FitzRoy, 2nd Duke of Grafton