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Male Henry Landon Click to view Henry Landon in the family tree

Henry was born in 1721.1   Henry's father was Samuel Landon and his mother was Bethia Tuthill.  His paternal grandparents were Nathan Landon and Hannah Sandford; his maternal grandfather was Henry Tuthill. He had six brothers and two sisters, named Samuel, Parnell, Nathaniel, David, Jonathan, Jared, Hannah and Bethia.1 

1 phelps.FTW @ Tree #1309
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #3455, 3455.ftw