skos:altLabel | - Frederick
- Stewart
- 4th Marquess
- The Marquess of Londonderry
- Viscount Castlereagh
- Frederick Stewart
- '''Frederick<br />4th<br />Marquess'''
- '''Frederick<br>4th<br>Marquess'''
- F Stewart
- Frederick Stewart, 4th Marquess
- Frederick Stewart, Viscount Castlereagh
- Frederick, Viscount Castlereagh
- Frederick<br />'''4th<br />Marquess'''
- Lord Frederick Stewart
- The 4th Marquess of Londonderry
- Frederick William Robert Stewart, 4th Marquess of Londonderry
- his half-brother
- the 4th Marquess of Londonderry
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