Save Gender Masculine Usage Dutch, Limburgish (Rare) Pronounced Pron. /ˈʃɑk/ [key·simplify] Other Forms FormsSjakkie (diminutive) Meaning & History Variant of Sjaak, of which the pronunciation was influenced by the French name Jacques.Also compare Jac, Jack and Jacq, which can be pronounced in the same way, but are generally more common.