1 Gerrit Jan SCHOOK =Boudewina VERMEULEN 2 Sanna SCHOOK =Johan Fredrik SIERIG Marriage: 9 Dec 1896, Amsterdam, Noord-Holland, Nederland 3 Carolina Frederika Elisabeth SIERIG =Heinrich Jurriaan BEIJER Marriage: 3 Jul 1924, Amsterdam, Noord-Holland, Nederland 3 Gerrit Jan SIERIG =Cornelia Maria Catharina MOENS Marriage: 19 Jun 1930, Amsterdam, Noord-Holland, Nederland 3 Sanna Johanna Frederika SIERIG