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Sidney Montagu 
Summary
Sidney Montagu may refer to:
- Sidney Montagu (MP, died 1644), English member of parliament (MP)
- Sidney Wortley Montagu (1650–1727), British coal-owner and MP
- Sidney Montagu, 11th Duke of Manchester (1929–1985), British hereditary peer
See also edit
- Sydney Montagu Samuel (1848–1884), English journalist, librettist, financier, and communal worker