From the French surname, used as a given name among Nonconformists in honour of the French Protestant theologian Jean Calvin (1509–64). The surname meant originally ‘little bald one’, from a diminutive of calve, a Norman and Picard form of French chauve ‘bald’. (The theologian was born in Noyon, Picardy.) Today the name possibly owes its popularity as much to the New York fashion designer Calvin Klein as to the theologian.
German and Jewish (Ashkenazic): nickname from Middle High German vertec ‘skillful’, ‘ready’, ‘prepared’ (German fertig), Old High German fertīg, a derivative of vart ‘journey’, ‘expedition’, and so meaning originally ‘ready for an expedition’.