Sjef is a Dutch short form of the name Jozef, which itself is a local variant of Joseph. The name Joseph derives from the Hebrew name Yosef, meaning "he will add" (from the root yasaf, "to add, to increase"). In the Old Testament, Joseph is the eleventh son of Jacob and Rachel, who was sold into slavery by his brothers but later became a powerful advisor to the Pharaoh. In the New Testament, Joseph is the husband of Mary, the mother of Jesus. Over centuries, the name spread widely across cultures, taking various forms. Usage in the Netherlands Sjef is a quintessentially Dutch diminutive, commonly used in the Netherlands and Flanders. While Jozef is the formal equivalent of Joseph in Dutch, Sjef arose as a familiar, affectionate short form, similar to other Dutch diminutives like Jef from the same root. It reflects the Dutch tendency to create clipped or interior forms of longer names. However, unlike its fuller counterpart, Sjef has maintained a distinctly informal character, seldom used in official registers but popular in everyday speech. Despite the global popularity of Joseph in many forms, Sjef remains relatively rare outside the Dutch-speaking world. Notable Bearers Sjef Hensgens (1948–2024), Dutch middle-distance runner known for setting European records in the 800 meters and 1500 meters. Sjef Janssen (born 1950), Dutch dressage coach who has trained multiple Olympic medalists. Sjef Mertens (1926–2004), Dutch footballer who played as a midfielder for PSV Eindhoven. Sjef van den Berg (born 1995), Dutch competitive archer who represented the Netherlands at the Olympics. Sjef van Run (1904–1973), Dutch footballer who competed in the 1928 Summer Olympics. Cultural Significance Sjef exemplifies the informal, abbreviated naming convention common in the Netherlands, where many formal given names—particularly biblical names like Joseph—have familiar short forms that operate almost independently. While the name carries no standalone etymology apart from Joseph, it fosters a distinct identity, especially among Dutch sports figures and older generations. Though its usage has declined in recent decades, Sjef remains a recognizable and affectionate name, emblematic of Dutch linguistic creativity.