Louis Montagu, 2nd Baron Swaythling
Louis Samuel Montagu, 2nd Baron Swaythling (1869–1927) was a prominent member of the British Jewish community, a financier, and a political activist. He was the son and heir of Samuel Montagu, 1st Baron Swaythling, and of his wife Ellen (Cohen).
He was educated at Clifton College, and later became head of the family banking business.
In 1917, along with Lionel Nathan de Rothschild and Sir Philip Magnus, he co-founded the anti-Zionist League of British Jews. He was president of the Federation of Synagogues, until 1925.  He opposed the Balfour Declaration.
He was married to Gladys Helen Rachel Goldsmid (1879–1965), a member of both the Goldsmith and Rothschild banking families. They had four children:
- Stuart Albert Montagu, 3rd Baron Swaythling and father of David Montagu, 4th Baron Swaythling.
- Ewen Montagu, lawyer, judge, and naval officer.
- Ivor Montagu, film maker.
- Joyce Ida Jessie Montagu.
Styles of address
- 1869–1907: Mr Louis Montagu
- 1907–1911: The Honourable Louis Montagu
- 1911–1927: The Right Honourable The Lord Swaythling[a]
- Although The Lord Swaythling was a baronet, by custom the post-nominal of "Bt" is omitted, as Peers of the Realm do not list subsidiary hereditary titles.
- Alderman, Geoffrey (2008). Controversy and Crisis: Studies in the History of the Jews in Modern Britain. Academic Studies PRess. ISBN 9781934843222.
- The Jews of Britain, 1656 to 2000. University of California Press. 2002. ISBN 9780520227194.
- The Divided Elite: Economics, Politics, and Anglo-Jewry, 1882-1917. BRILL. 1992. ISBN 9789004094475.
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