This responds to your query dated 9 July 2005. My gg grandfather was Jacob Nibbe (25 Jul 1819-4 Mar 1900) and I think his brother was John Nibbe (27 Oct 1922-22 Mar 1872).
Jacob Nibbe married Mrs Margarethe Schuler who seems to be Margarethe Dumet. See information about Stymus Burying Ground, Central Park, Nassau Co., New York and Deaths Reported by the Long Islander 1891-1900 - S Surnames.
Family records suggest John Nibbe went to America in 1862 with some of Jacob Nibbe's sons and that they went through New Orleans.
We, too, would like to learn more about John Nibbe.
Marian Glew