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Male John De Koven Alsop Click to view John De Koven Alsop in the family tree

John De Koven was born on April 7th, 1879.1   John De Koven's father was Joseph Wright Alsop and his mother was Elizabeth Winthrop Beach.  His maternal grandparents were Hunn Carrington Beach and Mary C. Dekoven. He had three brothers and three sisters, named Joseph Wright, Francis J. O., Charles William Dabney, Aimee Elizabeth, Mary Oliver and Elizabeth Winthrop Beach.  He was the third youngest of the seven children.1 

1 preston.FTW
Further source/citation:
World Family Tree Vol. 9, Ed. 1 @ Tree #0216