sentences:  Ridderbos was born in Easterein, Friesland, the Netherlands.His father, Jan Ridderbos, was an ordained minister in the Reformed Churches in the Netherlands, a biblical commentator, and professor of Old Testament at the Theological School of the Reformed Churches of the Netherlands in Kampen.Herman Ridderbos completed his undergraduate studies there, and did his post-graduate work at the Free University of Amsterdam under F. W. Grosheide, qualifying for his doctorate in 1936.