The Spanish word 'jacuzzi' comes from the Italian family name Jacuzzi, which became famous as a brand name in 1966. The Jacuzzi surname itself is formed from two parts: the Italian given name 'Iacovo' (a variant of Jacob) and the Italian patronymic suffix '-zzi'. Going back further, the name Jacob comes from the Hebrew word 'ya'aqoḇ', meaning 'one who grasps the heel'. The word entered Spanish as a generic term for a whirlpool bath after the Jacuzzi brand became widely recognized for their spa and bath products.

Since 'jacuzzi' entered Spanish directly from a modern brand name, there aren't any simpler or more common Spanish words that share its etymology.

The English word 'Jacob' and its variants like 'Jake' share the same ancient Hebrew root as 'jacuzzi', though they followed a different path through history. While these names retained their meaning as given names, the Jacuzzi family name went on to become a trademark and eventually a generic term for whirlpool baths in both English and Spanish.