Jhr. Jan Willem van Sypesteyn 8 Oct 1816 Haarlem - 26 Feb 1866 's-Gravenhage Parents Cornelis Ascanius van Sypesteyn Cornelia Anna Druyvesteyn Children Jkvr. Maria Adriana van Sypesteyn Siblings Elisabeth Anna Petronella van Sypesteyn Jacob Wigbold Ascanius van Sypesteyn Cornelis Ascanius van Sypesteyn Jan Willem van Sypesteyn