I'm not an OHMS researcher, but in the 1915 history of Shelby Co., Iowa, page 127, it references the Danish settlements begun there about 1856."A slighter later settlement, chiefly from about 1874 to 1880, was that kown as Copenhagen, chiefly because of Danish immigrants.Among the Danish people belonging to this settlement were Hans HOOGENSEN, J.D. LORENTZEN, Chris HESS, H.P.N. STENDRUP, Mathias SORENSEN, and perhaps others.CLAUS OHMS, a native of Schleswig-Holstein, also belonged to this settlement."
On page 794 of the same book, there is a biography for NICHOLAS H. OHMS, son of CLAUS HENRY and ANNA MARIE (ELLEY) OHMS, born Dec 19, 1867, Schleswig, Germany.Claus Henry Ohms was born in Germany in 1834 and was a farmer and cooper.Anna Marie (Elley) Ohms was born in Denmark in 1829.Nicholas Ohms was the only child of his parents and was only two years of age when they came to America.Nicholas Ohms married February 24, 1893 to ANNA M. HANSEN, daughter of HANS N. HANSEN and CECELIA MARIE HANSEN; Anna was born in Denmark, Oct 1, 1872.Together Anna and Nicholas Ohms had 9 children:Anna, Cecelia, Henry, Elise, Hans D., Clara, Nellie, Emma and Mabel.
If you see a connection and want more details, I'll be posting this bio to the USGenWeb page for Shelby County, Iowa.