I'm also looking for a Nicholas Geoffroy family line, but I don't believe he ever left France. I think he had a brother Henri-Anton Geoffroy, but I have seen the census records of many of his sons coming over to the states and settling on the West coast. Nicholas Geoffroy (b. 25 Jan 1824) and Jeannette Gross (b.13 Dec 1822) married in 14 Apr 1845 according to French records. Whether or not this is the line I'm decended from , I am not certain.
I do know that at least all sons emmigrated to the US -
Dominick Geoffroy (b. Aug 1849) married Barbara Horner (b May 1861) and had at least 6 children - August (b. June 1884), William (b. Jan 1888), George (b. Nov 1889), Rosalie (b. Dec 1895), Joseph T. (b. Mar 1900), and Margaret (b. 1902) and lived in the Santa Clara, CA area during the 1900 and 1910 Cesus
Other siblings of Dominick Geoffroy include: Mary-Anne Geoffroy (b. Apr 1847) and married to Florent Messang?....Catharina Geoffroy (b. 1851) married to Joseph Schwartz?.......Michael August Geoffroy (b. 1857) never married? ........Victor Geoffroy (b.May 1859) married to Minnie (Willhamina) (b. Wisconsin 1859) - lived in Portland OR, no children known .....
...George Geoffroy (b.May 1844) no known marriage, but had brother Ferdinand (b.Oct 1861) living with him until George moved in with Barbara in 1907 (after Dominick died) then Ferdinand (still single) moved in with Michael August (also still single?).....all seemed to be brewers or proprietors of the brewery in Santa Clara......
........still more siblings! Rosalie Geoffroy (b. Apr 1862) never married? .....Celestine Geoffroy who married Nicholas Loutre, and whose daughter Celestine Loutre (b.Nov 1872 in Germany) moved to California - other daughter Adele Loutre is not known.
........one last sibling! Steven Geoffroy (b. Mar 1862) and married Cecelia Davids (b. Apr 1878) lived in Illinois and had at least 5 children: William (b.1902), Anna (b. 1905), John (b.1908), Edward (b.1912)
It was this last Edward who was my grandfather. Any help on any of these lines would be much appreiciated!