Lilian Helen "Lily" Montagu, CBE (22 December 1873 – 22 January 1963)[1] was the first woman to play a major role in Progressive Judaism.

He was a Liberal politician who sat in the House of Commons from 1885 to 1900 as the MP for Whitechapel, a poor district of the East End of London.

Her eldest brother, Louis, was also a financier and political activist, founding the League of British Jews to lobby against the creation of the state of Israel.

In February 1902 she arranged the first meeting of the Jewish Religious Union for the Advancement of Liberal Judaism at her sister Henrietta Franklin's house.

[4] Following the retirement of Leo Baeck, Montagu served for a brief stint (1955–1959) in her 80s as president of the World Union for Progressive Judaism, before handing the reins over to Solomon Freehof.