Rudolf van Reest (12 April 1897 in Rotterdam – 29 November 1979 in Groenekan) was the pseudonym of the Dutch writer Karel Cornelis van Spronsen.
Besides writing novels, he also wrote for the Dutch newspaper, originally a resistance periodical, Trouw.
Themes of his oeuvre include religious small-mindedness of small, rural communities and the 'nobility' to which adherence to the true nature of the Christian faith can elevate believers from all walks of life.