I. Jan van Doorn, stated to be living near Cothen, in the province of Utrecht, only about three miles from Doorn.  He m. Alyd, dau. of Jan van Bloemersween (or Bloemerweerde).  Their male children were (1) Jan (see next paragraph).   (2) Nicholaas, who m. Ermgard, dau. of Jan Roeter, and was living in 1480.  (3) Aert, who m. Machteld, dau. of Jan Granwert.  He had a son Willem, who m. Catharina, dau. of Jan van Derthuysen.  It is stated that Nicholas and his son Willem were also named van Brockhuysen.
    II. Jan van Doorn, who m. Alyd van Dompselaer.  His son was:
    III. Jan van Doorn, who m. Willemina van Soudenbalck (or Zondenbalg).  He is mentioned in 1493.  His son was:
    IV. Nicholas van Doorn, who m. Machteld, dau. of Jan Troeye and Maria Granwert.  He is mentioned in 1500.  Their male children were: (1) Jan see next paragraph).  (2) Willem, who m. Alyd Vuysting.  (3) Jan Willem, who m. Elsebé, dau. of Gerrit van Hensden.  He carried his coat-of-arms broken with that of his wife's family van Hensden, and had children... (The Van Doorn Family (Van Doorn, Van Dorn, Van Doren, Etc.) in Holland and America, 1088-1908, Honeyman, 1909).