'Calvinism' originates from the name 'Calvin,' specifically referring to John Calvin, a French theologian and reformer, with the suffix '-ism' denoting a system of beliefs or practices.

'Calvinism' was formed in the 16th century to describe the doctrines and followers of John Calvin, and eventually became the modern English word 'Calvinism.'

Initially, it referred specifically to the theological system of John Calvin, but over time it has come to refer more broadly to churches and movements influenced by his teachings.