My name is Wade Starks
My daughter-in-law also descends from Ole Holman and Hannah Elizabeth Sampson.

Taking your clue that Ole had a brother named Casper, I found Martin Olesen's family living in Berlin, Steele, Minnesota in 1880. See attachment.

It includes, Martin Olesen age 54; wife: Anna age 48; Son: M Ole Olesen age 25 and wife, Lisbeth age 20; Dau, Carra age 18; dau, Martha age 10; son, Casper age 11; son, Anton age 8; GDs, Clara age 3 and Lina age 1. These GDs would be Ole Olesen (Holman)'s daughters.