Background
He was the son and heir of Samuel Montagu, 1st Baron Swaythling.
He was the son and heir of Samuel Montagu, 1st Baron Swaythling.
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.
They had four children:
Ewen Montagu, lawyer, judge, and naval officer
Ivor Montagu, film maker. Joyce Ida Jessie Montagu.