Arthur Magennis, 1st Viscount Magennis of Iveagh Peerage person ID=257226 (1575–1629) Parents Hugh Magennis Annabel Reilly Children Evelyn Magennis Rose Magennis Catherine Magennis Hugh Magennis, 2nd Viscount Magennis of Iveagh Siblings Catherine O'Neill, Countess of Tyrone Rose Guinness Partners Sarah O'Neill