Jan Willem van Sypesteyn Dutch writer (1816-1866) (1816–1866) Parents Cornelis Ascanius van Sypesteyn Children Maria Adriana van Sypesteyn Catharinus Henri Cornelis Ascanius van Sypesteyn Siblings Jacob Wigbold Ascanius van Sypesteyn Cornelis Ascanius van Sypesteyn Elisabeth Anna Petronella van Sypesteyn Jhr. Jan Willem van Sypesteyn Partners Adriana Wilhelmina van Vredenburch