Dr. Tenma (天馬博士, Tenma-hakase?), whose real name is Umatarō Tenma (天馬午太郎, Tenma Umatarō?) and is also known as Dr. Nagamiya Tenma, Dr. Boynton, and Dr. Balthus, is the father/creator of Astro Boy in the anime and manga series of the same name created and animated by Osamu Tezuka.
Tenma means Pegasus and is literally translated from Japanese as Heaven-horse.
Read more about Dr. Tenma: Character Sketch, Appearances