Katharine Macmillan, Viscountess Macmillan of Ovenden British noble (1921-2017) (1921–2017) Parents Beatrice Ormsby-Gore, Lady Harlech William Ormsby-Gore, 4th Baron Harlech Children Rachel Macmillan Adam Macmillan Joshua Macmillan David Macmillan Alexander Macmillan, 2nd Earl of Stockton Siblings Owen Ormsby-Gore Elizabeth Ormsby-Gore David Ormsby-Gore, 5th Baron Harlech Mary Ormsby-Gore John Julian Stafford Ormsby-Gore Partners Maurice Macmillan