Jacob Vandenburg was born 1810ish and he died 1856 on the same day as his son Eza. He was married to Jennie Pieterman, she was born in 1811 and died in the 1870's. Their children were all born in Groningen Province, The Netherlands. They had Grace in 1836(possible half sister) Anna born 23 Sept.1840, son Eza born 1841 died 1856,Claus died age 4, Elizabeth (Betsy) born 2 April 1845 immigrated to the U.S in 1866 and lived her life in the Whiteside co, Ill area. She died in 1936. And daughter Bertha who marriedHarke Spoelma in 1869 and also lived in the Whiteside Co, Ill area.