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- L. B. Abbott (1908–1985), American cinematographer, cameraman and special effects expert
- Lawrence Fraser Abbott (1859–1933), American editor and writer
- Lee K. Abbott (born 1947), American writer
- Lemuel Abbott (1730–1776), English clergyman and poet
- Lemuel Francis Abbott (c. 1760 – 1802), English portrait painter
- Leonard Dalton Abbott (1878–1953), American publicist and radical thinker
- Lyman Abbott (1835–1922), American religious leader and author
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