Surname Jucas (Jucas 
, Ючас 
) , around the globe, is a rare family name. The surname Jucas is characteristic of Lithuania, where it is quite a rare surname, Belarus, where it is a rare surname, and Brazil, where it is a very rare surname. In absolute terms, the name is most common in Lithuania, Brazil, and the United States. More prevalently, Jucas is the forename as well as the last name.