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Male Alanson Alvord Click to view Alanson Alvord in the family tree

Alanson was born on August 7th, 1809.1   Alanson's father was William Alvord and his mother was Clarissa Griswold.  His paternal grandparents were Joseph Alvord and Lucy Griswold; his maternal grandfather was Isaac Griswold. He had three brothers named Felton, William and William Felton.  He was the youngest of the four children. He had a half-brother named Euclid W..  He died at 7 months old on April 3rd, 1810.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #0105, 0105.ftw @ Tree #0105