The name "Bosko" is formed from the adjectival base "bos-" (meaning 'barefoot') with the help of the substantivizing suffix "-ko". For example, the Cossack from the Priluky regiment in 1649, Bosko Sychyk (RVA 450). This name is also associated with the possessive-type surname of the Cossack Savko Boskov ziat (RVA 170).