The Tutwiler surname is most commonly found in the United States, where it is estimated that there are approximately 1,500 people with this last name. The majority of Tutwilers in the US are of German descent, and the name is believed to have originated in the region of Westphalia. The Tutwiler name is also found in other parts of the world, including Canada, England, and Australia, but it is much less common in these countries.