Family name Voyka (Войка 
, Voyka 
) , in all the world, is a rare surname. The surname Voyka is characteristic of Bulgaria, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and New Zealand, where it is a very rare surname. In absolute terms, the name is most common in Bulgaria, Kazakhstan, and Russia. Also, Voyka is the forename as well as the last name.