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Male Allen Hazen Click to view Allen Hazen in the family tree

Allen was born on August 28th, 1869 in Hartford, CT.1   Allen's father was Charles Dana Hazen and his mother was Abbie Maria Coleman.  His paternal grandparents were Allen Hazen and Dana Unknown; his maternal grandparents were Horace Pinneo Coleman and Martha Louisa Dewey. He had two brothers and two sisters, named Charles Dana, Richard, Anna Putnam and Louise Coleman.  He was the oldest of the five children.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 1, Ed. 1 @ Tree #3310, phelps.FTW, World Family Tree Vol. 4, Ed. 1 @ Tree #2332, 2332.ftw