Bertha Unzelman was a sister of my great grandmother Wilhelmina Sophia Unzelman, born 6 May 1869 in Fountain City, WI and died 16 Jan 1949 in Wentworth, SD. Wilhelmina married Frederick J. Schroeder; one of their daughters, Ida Bertha Schroeder, was my grandmother. I would love to share any information with you. Paul Schmidt