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Male Marinus Knapp Click to view Marinus Knapp in the family tree

Marinus was born on August 2nd, 1898 in Grand Rapids, Michigan.1   Marinus' father was Marinus "Martin" Antonie Knapp and his mother was Catharina "Kate" Kalkman.  His paternal grandfather was John Knop; his maternal grandparents were Kryn Kalkman and Maria Hoogendorp. He had five brothers and six sisters, named William, Kryn, Richard, Richard, Cornelius, Marie, Johanna "Anna", Marie, Elizabeth "Betsie", Elizabeth "Bessie" and Kathryn. He had a half-brother and four half-sisters, named John, Cora, Nellie, Hilda and Infant.  He died at the age of 35 in 1933 in Grand Rapids, Michigan.1 

Family Details of Marinus' family with Margaret Tromp

1 phelps.FTW
Further source/citation:
World Family Tree Vol. 22, Ed. 1 @ Tree #2589