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Male Curtis Bertram Click to view Curtis Bertram in the family tree

Curtis was born about April 1896 in Michigan.1   Curtis' father was Gustave Bertram and his mother was Maria Louise Wilhelmine Brandt.  His maternal grandparents were Wilhelm Friedrick Ludwig Brandt and Wilhelmine Elizabeth Schlaeger. He had two brothers and three sisters, named Harold, Edwin, Laura, Martha and Nora.1 

1 basel.FTW
Further source/citation:
World Family Tree Vol. 9, Ed. 1 @ Tree #2571