Jeff is a masculine given name.
Jeff or JEFF may also refer to:
Arts and entertainment Jeff (album), a 2003 Jeff Beck album Jeff, also known as The Jeffrey Dahmer Files, a 2012 independent documentary film about Jeffrey Dahmer Jeff (1969 film), a French film starring Alain Delon Joseph Jefferson or Jeff Award, for excellence in theatre in the Chicago area Jazz Etno Funky Festival (JEFF), a music festival in Slovenia
Places in the United States A local nickname for Jeffersonville, Indiana Jeff, Kentucky, a census-designated place Jeff, Missouri, an unincorporated community
Surname Janina Jeff (born 1985), American geneticist Mary Jeff (1873–1941), Scottish activist and politician Sandra Jeff (born 1967 or 1968), American politician
Other uses JEFF, a file format allowing execution directly from static memory Joint Evaluated Fission and Fusion, an international organization for the production of nuclear data
See also Geoff (disambiguation) Robert Geffe (fl. 1393–1406), English Member of Parliament Jif (disambiguation)
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