sentences:  Kortmann’s brother, Sebastiaan Kortmann, is a professor of Dutch civil law, and was Rector Magnificus of the Radboud University Nijmegen from 10 May 2007 until 17 October 2014.Kortmann was asked regularly to give advice and explanation in matters of public law in Dutch media.Constantijn Kortmann died in Heilig Landstichting in 2016.