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Male John Rollin Knapp Click to view John Rollin Knapp in the family tree

John Rollin was born on October 10th, 1918 in Chicago, Cook, IL.1   John Rollin's father was Harry Parker Knapp and his mother was Marguerite Henry.  His paternal grandparents were Rollin G. Knapp and Cora L. Parker. He had a brother and a sister, named David Harry and Jane Hamilton. He had four half-brothers named Harry Ward, Roger G., Alan Darwin and Edwin Birke.  He died at the age of 61 on September 13th, 1980.1 

Family Details of John Rollin's family with Gertrude Lennon

1 phelps.FTW
Further source/citation:
World Family Tree Vol. 1, Ed. 1 @ Tree #1377