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

John was born after 1717.1   John's father was James Landon and his mother was Mary Vaill.  His paternal grandparents were Nathan Landon and Hannah Sandford; his maternal grandfather was John Vaill. He had five brothers and four sisters, named David, Daniel, James, Joseph, Nathan, Lydia, May, Rachel and Ann.1 

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