skos:altLabel | - Robert
- Robert Stewart
- Lord Londonderry
- Marquess of Londonderry
- Robert Stewart, 2nd Marquess of Londonderry
- The Marquess of Londonderry
- The Earl of Londonderry
- Earl of Londonderry
- half-siblings
- 1st Marquess of Londonderry
- Robert Stewart, 1st Earl of Londonderry
- Robert Stewart, 1st Viscount Castlereagh
- Robert Stewart, Baron Londonderry
- Robert<br />'''1st<br />Marquess'''
- Robert<br>'''1st<br>Marquess'''
- The 1st Marquess of Londonderry
- the first Marquess of Londonderry
- Robert Stewart, 1st Marquess of Londonderry, 1st Earl of Londonderry, 1st Viscount Castlereagh, 1st Baron Londonderry
- Robert Stewart, Earl (1796), and later Marquess (1816), of Londonderry
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