Jemmy

Jemmy is an English pet form of James, which derives through Late Latin Jacomus and Latin Jacobus from the Hebrew name Yaʿaqov, traditionally interpreted as meaning "he who supplants" or "holder of the heel," in reference to the biblical patriarch Jacob. It developed as a familiar diminutive alongside Jimmy and Jamie, and was commonly used in Britain from the early modern period onward. The name also appears as a generic term in British slang and folklore, reflecting its once widespread everyday familiarity. Related forms include James, Jim, Jimmy, Jamie, and the Scottish Hamish.