Lady Katherine Lambton (1862-1952) (1862–1952) Parents Lady Beatrix Hamilton George Lambton, 2nd Earl of Durham Children Lady Moira Osborne Dorothy Osborne John Osborne, 11th Duke of Leeds Lady Olga Osborne Lady Gwendolen Osborne Siblings George Lambton Lady Beatrix Lambton William Lambton Eleanor Lambton Frederick Lambton, 4th Earl of Durham Lady Anne Lambton Charles Lambton D'Arcy Lambton Hedworth Meux Francis Lambton Claud Lambton John Lambton, 3rd Earl of Durham Partners George Osborne, 10th Duke of Leeds