The Lady Rothschild
Teresa Georgina Mayor
10 September 1915
|Died||29 May 1996 (aged 80)|
|Alma mater||Newnham College, Cambridge|
|Spouse(s)||Victor Rothschild, 3rd Baron Rothschild|
|Children||4, including Emma Georgina Rothschild and Amschel Rothschild|
|Parent(s)||Robert John Grote Mayor|
(Katherine) Beatrice Meinertzhagen
|Relatives||F. M. Mayor|
Teresa Georgina "Tess" Rothschild, Lady Rothschild, MBE, JP (née Mayor; 10 September 1915 – 29 May 1996) was a British counter-intelligence officer and magistrate. She was the second wife of Victor Rothschild, 3rd Baron Rothschild.
She was born Teresa Georgina Mayor in London on 10 September 1915, the daughter of Robert John Grote Mayor (1869–1947), a civil servant working for the Board of Education, and his wife, (Katherine) Beatrice Mayor, née Meinertzhagen (1885–1971), a poet and playwright. 
Her maternal grandfather was Robert John Grote Mayor, the brother of English novelist F. M. Mayor and a greatnephew of the philosopher and clergyman John Grote. Her maternal grandmother, Katherine Beatrice Meinertzhagen, was the sister of soldier Richard Meinertzhagen, and the niece of author Beatrice Webb.
After Cambridge, she worked for the publisher Jonathan Cape. During the Second World War, she was recruited by MI5 to work as assistant to Victor Rothschild, 3rd Baron Rothschild, working in anti-sabotage operations.
She became a magistrate, and was Chairman of the Bench, and was a lecturer at the Cambridge Institute of Criminology, and she sat on various Home Office boards investigating the subject of penal reform. She was a trustee of Cambridge's Arts Theatre.
- Emma Georgina Rothschild (born 1948), married the economist Amartya Sen (born 1933) in 1991
- Benjamin Mayer Rothschild (born and died 1952)
- Victoria Katherine Rothschild (born 1953), lecturer at Queen Mary, University of London, and the second wife of the writer Simon Gray (1936–2008)
- Amschel Mayor James Rothschild (1955–1996), married to Anita Patience Guinness, worked for N.M. Rothschild & Sons, and killed himself in 1996
Rothschild died on 29 May 1996 in London, and was survived by her two daughters, both of whom pursued academic careers, and a son, who entered the Rothschild banking business.