I was curious about Clarno as well. I noticed one of my ancestors, Miles Alonso Moser moved to Clarno, SD from Monroe Wisconsin, where he was working for a Harrison Clarno. The coincidence seems unlikely - and I thought behalf my ancestor was following someone he respected.
Birth18527 DecMauch Chunk, Carbon, Pennsylvania, United States Miles was born Dec 7, 1852, according to family Bible in or near Mauch Chunk
Emigration1856-1862— Age: 4Pennsylvania, USA to Oneco, Stephenson County, IL Miles emigrated with his parents. They settled near Oneco; and could have lived near Rock Grove. In 1870's, they lived in Green County, Wic.
Occupation1864— Age: 12Clarno wisconsin While his father was serving in the Civil War, Miles was working for Harrison Clarno as a farm hand
....1917— Age: 65Lake County, South Dakota, USA Miles moved to the Winfred and Madison areas in Lake County, SD, where he lived with his nephew, Nathan Corning. Miles worked for Nathan on his farm in exchange for room and board.