I don't think we have a connection but I did a little detective work and found this for you....
1900 Census of Creighton Twp, Knox County, Nebraska Mark, Frank M. b. Feb 1862 in Nebraska married 6 years Leona L. b. Nov 1869 in Iowa Fa: Ohio Mo: Pennsylvania Hary E. b. Sep 1893 Nebraska Ralph M b. Jun 1892b Nebraska Myrtle M. May 1899 Nebraska (Llora's bros. are also listed. If you want a copy of these census let me know)
1880 Census Creighton, Knox County, Nebraska Nihart, Elias 50 Ohio Rachel 50 Pennsylvania Nathaniel 25 Illinois Lesander 21 Iowa Albin 19 Iowa Lucretia 11 Iowa
*** can't seem to find the families in 1870 or 1860
1850 Census Boone Twp, Porter County, Indiana Nihart, George 50 PA Catherine 54 PA Elias 20 Ohio Elizabeth 16 Ohio Esther 10 Ohio Olinger, John 29 Ohio Philip 34 Ohio Mary 7 Ohio
George Nighart married Catherine Olinger 2 Apr 1829 in Holmes County, Ohio
1840 Census has George in German Twp, Holmes County, Ohio. The Olinger's were in German in 1830. I think it would be safe to say that Elias was born in German Twp. I will see if I can find more.