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- Madeline Bell (born 1942), American soul singer
- Madison Smartt Bell (born 1957), author
- Maggie Bell, British singer
- Manga Ndumbe Bell (1838–1898), Duala ruler in Cameroon
- Marc Bell, one of several people
- Maria Arena Bell, American novelist, television and freelance writer.
- Marie Bell (born 1900), French tragedian, comic actor and stage director
- Marilyn Bell (born 1937), swimmer
- Mark Bell, one of several people
- Marshall Bell (born 1942), American actor
- Martin Bell, British journalist and broadcaster
- Martin Bell (born 1964), British skier
- Martin Bell, British poet
- Martyn Bell, British racing driver
- Marvin Bell, American poet
- Mary Bell (born 1957), British child killer
- Matthew Bell, one of several people
- Matty Bell (1899–1983), American football player and coach
- Melissa Bell, one of several people including
- Melissa Bell (singer), British singer
- Melissa Bell (actress), Australian soap opera actress
- Mervyn Bell, football manager
- Michael Bell or Mike Bell, one of several people
- Morley Bell, lawyer and political figure on Prince Edward Island
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