1. | Klaas Johans de Jong was born on 07 May 1874 in Heerenveen, Schoterland, FR, NLD. Klaas married Bernardine Antoinette Louise Calkoen on 30 Oct 1902 in Watergraafsmeer, NH, NLD. Bernardine (daughter of Andries Calkoen and Maria Hillegonda Overgaauw) was born about 1875 in Amsterdam, NH, NLD. [Group Sheet] [Family Chart] |