Cognomen Туоми (Tuomi 
, Туоми 
, Tuomy 
) , in the entire world, is quite a rare family name. The last name Туоми is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is quite a rare surname, and Latvia, where it is a rare surname. Not in comparison with a country's population, it is commonest in Finland, the United States, and Canada.