From "History of La Crosse County, Wisconsin", 1881, p. 733. City of La Crosse CARL AHRENS, merchant on Third street, between Vine and Pine, has been in his present business in La Crosse since 1870. He was born in Brunswick, Germany, in 1842, son of Ludwig Ahrens; came to the United States in 1864, and has resided in La Crosse since that time. He is a wagon-maker by trade, and worked at that business in La Crosse till 1870. He was married in 1871, to Catharine Bey, and has four children - Henry, Lizzie, Carl and Katrina. He has been President of the Concordia Society of La Crosse ever since its organization in 1870. [I am not related to this family and have no further information. I'm posting this as a service, and hope it helps!]