His sister , Katherine Isobel McEwen , married Roger Lumley , 11th Earl of Scarbrough on 12 July 1922 at St Margaret 's , Westminster .
His sister , Katherine Isobel McEwen , had five children with him .
His sister , Katherine Isobel McEwen , married Roger Lumley , 11th Earl of Scarbrough on 12 July 1922 at St Margaret 's , Westminster and had five children with him .