Its been awhile since I visited the Luhman(n) site. From the 1880 US Census we see that Nicholas is from Hannover, Germany
Descendants of Nicolaus Luhmann
1 Nicolaus Luhmann b: February 11, 1822 in Hanover, Germany d: June 02, 1894 in Lewiston, Winona Co., MN
. +Gesche Dammann
..... 2 John Henry Luhman b: March 20, 1846 in Hanover, Germany d: April 29, 1923 in Dover Twp., MN
......... +Barbara Brown b: October 18, 1854 in Tuscarawas Co., Ohio d: June 02, 1937 in Dover Twp., MN