The name may be derived from the Slovak common noun kozák meaning ‘cossack, brown birch bolete (mushroom)’ and refers to a characteristic feature. It may also be derived from the Slovak ethnonym kozák ‘Cossack, free peasant serving as a cavalry soldier’ and refer to an occupation or a similarity to or a connection (descendence or other) with the people or the area they inhabit. Variant: Kozak.