Cognomen Clann (Klan 
, Clann 
, Klano 
) , globally, is quite a rare surname. The surname Clann is habitual in Czechia, where it is quite a rare surname, Germany, where it is a rare surname, and Denmark. Not in comparison with a country's population, it is commonest in Germany, Czechia, and the United States. Much less frequently, Clann is the forename as well as the last name.