Jem

Jem is an English name that arose as a diminutive or colloquial form of James, which itself derives from the Late Latin Iacomus, a variant of Iacobus, rooted in the Hebrew name Yaakov meaning supplanter or one who follows at the heel. It was used as an informal spoken form in Britain from the early modern period onward. The name gained wider recognition through literature, most notably as the nickname of the elder brother Jeremy Finch in Harper Lee's novel To Kill a Mockingbird. Related forms include Jim, Jimmy, and Jamie.