John Callsen came to the Ypsilanti community with his parents, Hans and Christina Callsen, from Juntley, Illinois, where he farmed with his father.
John and Signora Thompson were married in 1928, after which they continued to reside on the family farm.
Prior to her marriage, Signora was employed at the Spaulding Store, under both Ruud and Nichols, and had also been employed by the Farmers State Bank.
John Callsen died in 1973. At the time that the Ypsilanti Community Centennial Book was published in 1982, Signora was still living on the family farm and was still active in community affairs.
John and Signora Callsen had one daughter, Margaret, who became an associate professor in the college of Home Economics, Oklahoma State University.