Joost is a Dutch masculine given name, a form of Iudocus (see Joyce), though it is sometimes used as a diminutive of names such as Justus or Jozef. Etymology The name ultimately derives from the Breton name Judoc, meaning "lord", which was Latinized as Iudocus. Saint Judoc (sometimes anglicized as Josse) was a seventh-century Breton prince who gave up royal privileges to become a priest and hermit; his cult spread through Brittany and northern France. After the Norman Conquest, Breton settlers carried the name to England, where it became known as Josse or Joyce. Although the masculine form fell out of use in England after the 14th century, it persisted in the Netherlands, where it evolved into variants such as Joost. The name has also been linked to the Dutch use of diminutives, as seen in the related names: Jef, Joep, Joes, Joop, Joos, and Jos. Notable Bearers Among notable figures with the name are several Dutch artists and athletes. Painted by Rembrandt in the 17th century, Joost van den Vondel (1587–1679) was a celebrated Dutch poet and playwright, often called the national poet of the Netherlands. In sports, Joost Luiten (born 1986) is a professional golfer, and Joost van Aken (born 1994) is a footballer. The name also appears beyond the Netherlands: in the English-speaking world, Joost is known from the multi-billion dollar private equity and venture capital firm Thiel Capital co-founded by Joost B. Spoor, though ironically the name there is often a surname or a given name of Dutch origin. Cultural Significance Though less common outside the Netherlands, Joost has been used in popular culture as a given name representing Dutch heritage. The internet TV platform Joost, launched in 2006 by Skype founders Niklas Zennström and Janus Friis, bore the name but has no direct onomastic influence. Nevertheless, it introduced the name to a global audience. Variants and Distribution The name has several Dutch variants given above. In other languages, other cultures and equivalents exist: for example, the French form Joseph (though Joseph derives separately from Hebrew tradition) or the Flemish form Jef’s related abbreviation of Jozef, which appears with Zef in Albanian and Arabian forms like Yousef, Yousif, Youssef, and Yousuf. The surname Joosten derives from Joost and is common in the Netherlands and Flanders. Meaning: Derived from Iudocus (Judoc), meaning "lord" Origin: Dutch, ultimately from Breton Type: Form / Diminutive of Justus, Jozef Usage regions: Netherlands, Flanders