Jem is a given name, sometimes as a nickname for James, Jeremiah, Jeremy, Jemma, or Jemima, and sometimes as an anglicized version of the Turkish name Cem.
People with the name include:
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- Jem Belcher (1781–1811), English bare-knuckle boxer
- Jem Cohen (born 1962), American filmmaker
- Jem Finer (born 1955), English musician, artist and composer, a founding member of the Pogues
- Jem Karacan (born 1989), English footballer
- Jem Mace (1831–1910), English bare-knuckle boxer
- Jem Shaw (1836–1888), English cricketer
- Jem Smith (1863–1931), English bare-knuckle boxer
- Jem Stansfield (born 1975), inventor and television presenter
- Jem Ward (1800–1884), English bare-knuckle boxer