Mark Twain was born Samuel Langhorne Clemens on November 30, 1835 in Florida, Missouri. He was the sixth child of John Marshall Clemens, a judge and Jane Lampton who had no idea they had become parents to what would be one of the most famous personalities in America. Historical biographies written for kids. Learn the life story and biography of influencial people: US Presidents, World Leaders, Inventors, Women, Artists, Civil Rights heroes. Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer.. He was lauded as the "greatest humorist this country has produced", and William Faulkner called him "the father of American literature".