Stichting Gebroeders de Jong's Leen

Stichting Gebrs. de Jong’s Leen is a Dutch foundation established in 1921 to manage the legacy of the De Jong brothers. Their estate supports the education of descendants of Herre Rinia and Reinskje van der Sluis. The foundation administers a family register to help eligible descendants establish their connection to the family and access its educational support.

The foundation awards financial grants, known as “pensies,” to descendants who are pursuing an education, working toward a doctorate, or undertaking another educational achievement. Applicants must submit a completed application during a designated application period; the board decides whether to award support. The foundation verifies eligibility in part through its genealogical register, which it also maintains and updates with family events such as births, marriages, divorces, and deaths.

Its website provides information about the register, the foundation’s history, Makkum, publications, news, and the Tjeerd de Jong Prize. Founded to carry out the brothers’ educational purpose, the organization continues to manage the legacy and support qualifying family members in their studies and educational pursuits.