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Male Arthur Karl Kopkau Click to view Arthur Karl Kopkau in the family tree

Arthur Karl was born on December 25th, 1899 in Lansing, Ingham Co, Michigan.1   Arthur Karl's father was Frederich Kopkau and his mother was Augusta Loskofski.  His maternal grandparents were Frederick Loskofski and Johanna Rominski. He had two brothers and a sister, named Frederich Wilhelm, Clarence Edward and Grace Augusta Wilhelmine.  He was the youngest of the four children.  He died at the age of 66 in December 1965 in Michigan.1 

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