Last name Tomsan (Tomsan 
) , throughout the world, is a rare cognomen. The family name Tomsan is habitual in Bulgaria, where it is quite a rare surname, Turkey, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Bulgaria, Turkey, and India. Likewise, Tomsan is the forename as well as the last name.