John Knop 
John were married in a religious ceremony.1 He had a biological son named Marinus "Martin" Antonie.
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Children
Marinus "Martin" Antonie Knapp
Marinus "Martin" Antonie was born on September 2nd, 1864 in Tholen Netherlands.1 He died at the age of 81 on February 7th, 1946 in Grand Rapids, Michigan.1