Last name Крен (Kren 
, Крен 
) , worldwide, is quite a rare family name. The last name Крен is characteristic of Slovenia, where it is quite a common surname, Czechia, where it is quite a rare surname, and Austria. Measured by absolute frequency, the name is most common in Indonesia, Czechia, and the United States. Much less frequently, Крен is the forename as well as the last name.