Family name コシナ (コシナ 
, Koscina 
) , globally, is a very rare last name. The last name コシナ is characteristic of Chile, where it is a rare surname, Venezuela, where it is an extremely rare surname, and the United Kingdom. Measured by absolute frequency, the name is most common in Chile, the United States, and the United Kingdom. Likewise, コシナ is the forename as well as the last name.