Surname Буйка (Buika 
, Буйка 
) , worldwide, is a rare last name. The last name Буйка is characteristic of Lithuania, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Romania. Measured by absolute frequency, this name is the most popular in Lithuania, Spain, and the United States. Very seldom, Буйка is the forename as well as the last name.