Last name Туомас (Tuomas 
, Туомас 
) , globally, is a rare cognomen. The surname Туомас is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, Lithuania, and Latvia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Northern Europe, particularly Finland, Lithuania, and Sweden. More prevalently, Туомас is the forename as well as the last name.