Worldwide, Boyko (Boyko 
, Бойко 
, Боико ) is quite a rare boy's first name. The first name Boyko is habitual in Bulgaria, where it is quite a common masculine name, Romania, where it is a rare boy's name, and Angola. Measured by absolute frequency, it is commonest in Bulgaria, Angola, and Afghanistan. Much more prevalently, Boyko is the last name as well as the forename.