List of Famous people named Jef

Jef D. Boeke is an American geneticist who is currently the founding director of The Institute for Systems Genetics at NYU Langone Medical Center. From 1986 to 2014 he was on the faculty of The Johns Hopkins University School of Medicine, where he was the founding director of the High Throughput (HiT) Center. He is a member of the American Academy of Arts and Sciences as well as the National Academy of Sciences.

Jef Aérosol is the pseudonym of Jean-François Perroy, a French stencil graffiti artist. He has been an urban art proponent in France since 1982, and is a contemporary of Blek le Rat and Speedy Graphito.

Jef Raskin was an American human–computer interface expert best known for conceiving and starting the Macintosh project at Apple in the late 1970s.

Jozef Adriaan Anna Geeraerts, better known as Jef Geeraerts, was a Belgian writer.

Josephus Carel Franciscus (Jef) Last was a Dutch poet, writer, translator and cosmopolitan.

Jef Lahaye was a Dutch professional racing cyclist. He rode in three editions of the Tour de France.

Jef Le Penven was a French composer, born in Pontivy, Morbihan, Brittany.

Joseph "Jef" Planckaert was a Belgian racing cyclist. He is seen as one of the best Belgian cyclists of the 1950s and 1960s.

Jef Demuysere was a Belgian professional road bicycle racer. He finished on the podium of the Tour de France in 1929 and 1931, and on the podium of the Giro d'Italia in 1932 and 1933.