Jelmer Jan Steenhuis (Amsterdam, 25 March 1954) is a Dutch creator of puzzles and games. Steenhuis is best known for his weekly puzzles in the newspaper NRC Handelsblad and magazine Vrij Nederland. Jelmer Steenhuis used to be a lawyer, an occupation he gradually started to combine with the design of puzzles. From 1987 he was responsible for the cryptic crossword in NRC Handelsblad, the so-called , a renowned puzzle that until then was compiled by Henk Scheltes. Later on, from 1990, Steenhuis also started to compile a weekly variety puzzle in the Vrij Nederland, loosely based on similar puzzles in American periodicals.