D. H. Th. Vollenhoven was a Dutch theologian and philosopher, known for his contributions to the field of Reformed theology. He was born in 1892 and became a prominent figure in the Free University of Amsterdam, where he developed his ideas on the relationship between faith and reason. Vollenhoven is best known for his work on the concept of philosophical grounding in theology, emphasizing the importance of a distinctively Christian worldview. His writings have influenced many scholars in the Reformed tradition, and he is often associated with the movement of Neo-Calvinism.