Johannes Albertus Ruigrok (1896-1989) and  Catharina Johanna de Vreede (1896-1976). When you go back six generations, the ancestors of Johannes Albertus are the same as those of Apolonia Ruigrok, the wife of Peter Leonard Zeestraten: Leendert Jans Ruigrok and Crijntje Jans van Langeveld, married in 1702 in Wassenaar. For an overview see this page. Johannes Albertus (born in Veur in South Holland) was bridgemaster in Delft. Catherine was born in Stompwijk. Her ancestors came from near Zoetermeer/Nootdorp. All ancestors of this couple are Roman Catholic.