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Male Nelson Cornelius Henderson Click to view Nelson Cornelius Henderson in the family tree

Nelson Cornelius was born on May 15th, 1842.1   Nelson Cornelius' father was Charles H. Henderson and his mother was Caroline M. Gillet.  His maternal grandparents were Horace Gillet and Rachel Austin. He had a brother and four sisters, named Charles Cornelius, Mary Jane, Adeialde, Caroline Isadore and Caroline.  He was the second oldest of the six children.1 

1 World Family Tree Vol. 1, Ed. 1 @ Tree #2003
Further sources/citations:
World Family Tree Vol. 1, Ed. 1 @ Tree #2002, phelps.FTW