Jaco is a short form of Jacob, the Hebrew biblical name traditionally interpreted as 'supplanter.'
Jaco is a compact and charismatic form of Jacob, the Hebrew name Ya'akov, meaning "he who supplants" or, in a more generous reading, "one who follows closely at the heel." It surfaces in Portuguese, Afrikaans, and broader South African naming culture as an affectionate diminutive that manages to feel both intimate and strong. In some European traditions it overlaps with Giacomo and Iago as regional cousins to the same ancient root.
The name's most celebrated modern bearer is the American bassist Jaco Pastorius (1951–1987), widely regarded as the greatest electric bassist in history. His luminous, tragic career with Weather Report and as a solo artist gave the name an unmistakable aura of musical genius and restless brilliance. In South Africa, Jaco has been a popular Afrikaner name for decades, carried by athletes, musicians, and public figures, grounding it with an earthy, spirited character quite distinct from the more formal Jacob.
Jaco occupies an interesting niche — short enough to feel modern, rooted enough to feel ancestral. It carries the full weight of one of the Bible's most dramatic figures (the patriarch who wrestled with an angel and fathered the twelve tribes of Israel) while wearing that inheritance lightly, almost casually. For parents who want something brief, punchy, and culturally layered, Jaco delivers on every count.