Jacob born March 1831 in Darmstadt, Germany married Katherina. I do not know her maiden name, all records I have list her as Katherina Gillen so she may have been a Gillen too. She also was born in Darmstadt. They immigrated to the U.S.A. in 1850 and settled in Manhattan and Brooklyn, New York.
They had 5 children all born in New York. George William, born Oct. 1852, Catharina born May 13, 1856, Frederick Jacob born Feb. 28, 1859, Gustav born 1862 and and unknown child.
I would like to know who Jacob and Katherina's parents were and if they had any siblings.