Since it's such a unique spelling, I'm wondering if all Ehrhardt's are releated somewhere along the line. I am decended on my father's side from Christian Ehrhardt b. 31 Mar 1828, d. 16 Apr 1906, who left Oberhoffen by Bischwiler, Alsace, around 9/9/1846 and came to the United States via New Orleans. He m. Barbara Buchner b. 21 Jan 1827, d. 15 Feb 1902, 20 Aug, 1854 in Waukesha, Wisconsin. Barbara Buchner was born near Nurnberg in Huppurgin, Konigreich Bayern and came to the United States via New York. I have some information on this family if it will help anyone, and am always interested in picking up additional information.