Waldo David Frank (August 25, 1889 – January 9, 1967) was an American novelist, historian, political activist, and literary critic, who wrote extensively for The New Yorker and The New Republic during the 1920s and 1930s.

Founder of the Waldensian reform movement.

(December 17, 1884 – March 8, 1970) an American painter, who for many years reveled in living the life of a bohemian expatriate.

Philosopher, poet, essayist, transcendentalist, lecturer.

American essayist, philosopher, poet, transcendentalist.

Influential African-American author, scholar.

(born Jeanette Marie Waldo; February 4, 1919 – June 12, 2016) an American radio and voice actress.

"The Waldo Moment" is the third episode in the second series of the British science fiction anthology television series Black Mirror.