Jef is a boy name with roots in Dutch and Hebrew culture. A Dutch and Flemish short form of Jozef (Joseph), from the Hebrew 'Yosef', 'he will add'.
The numerology number for Jef is 5, reflecting the personality traits and characteristics associated with this name.
Origin : dutch, hebrew
Gender : boy
Numerology : 5
Syllables : 1
Last updated 21 October 2026 · How we research names · Report a mistake
In numerology, the name Jef reduces to the number 5, which is most often linked to freedom, adventure, adaptability. A person carrying this vibration is often restless in the best way - curious about people and places, quick to learn, and energised by change rather than threatened by it.
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