- Date of birth: August 02, 1841
- Died: September 30, 1918
- Born: in Ossining, New York, The United States.
- Description: Ingersoll Lockwood was an American lawyer and writer. As a writer, he is particularly known today for his Baron Trump children's novels. He wrote other children's novels, the dystopian novel 1900: or; The Last President, a play, and several non-fiction works. He wrote some of his non-fiction under the pseudonym Irwin Longman.