Cognomen Boncha (Boncha 
, Бонча 
) , worldwide, is a very rare family name. The surname Boncha is characteristic of Slovenia, where it is a rare surname, the United States, where it is an extremely rare surname, and Ukraine. Not in comparison with a country's population, it is the most numerous in the United States, India, and Slovenia. More frequently, Boncha is the forename as well as the last name.