The name is derived from the Czech common noun kozák meaning ‘goat herdsman’ and refers to an occupation. It may also be derived from the Czech common noun kozák meaning ‘brown birch bolete’; with unclear reason for naming. Alternatively, it may also be derived from the Czech ethnonym Kozák ‘Cossack’ and refer to a similarity or a connection (descendence or other) with the people or the area they inhabit. Finally, it may also be derived from the Czech toponym Kozácko ‘region in South Bohemia near Želeč’ and refer to a place of residence or origin.