Norman Macleod Buchan of Auchmacoy, 18th Earl of Caithness (1862-1947) (1862–1947) Parents Janet Macleod James Augustus Sinclair, 16th Earl of Caithness Children Lady Augusta Buchan Olivia Trevor, 17th of Auchmacoy Lady Lucy Buchan Teresa Sinclair Lady Diana Buchan Siblings Lady Mary Jessie Sinclair John Sutherland Sinclair, 17th Earl of Caithness George Arthur Sinclair Charles Augustus Sinclair Lady Margaret Helen Sinclair Lady Euphemia Wilhelmina Sinclair Lady Meredith Isabel Sinclair Partners Lilian Higford