Waldo is the surname of: Clarence Abiathar Waldo, American mathematician, author, and educator Daniel Waldo, veteran of the American Revolutionary War, missionary and U.S. House clergyman Daniel Waldo, American legislator in the Provisional Government of Oregon Dr. Dwight B. Waldo, first president of Western Michigan University Dwight Waldo, American political scientist Edward Hamilton Waldo, birth name of American science fiction author Theodore Sturgeon George E. Waldo, American politician Janet Waldo, American actress and voice artist Jim Waldo, computer scientist and software architect John B. Waldo, jurist and conservationist in Oregon, United States Octavia Waldo, American writer Peter Waldo, founder of a Christian sect called the Waldensians Rhinelander Waldo, former U.S. Army captain, Fire and later Police Commissioner of New York City Samuel Waldo, Massachusetts land speculator, soldier and political figure Samuel Lovett Waldo, American painter William Waldo William Waldo Wikipedia