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

Thomas was born on March 10th, 1775.1   Thomas' father was Thomas Landon and his mother was Experience Johnson.  His paternal grandparents were David Landon and Mary Osborn. He had four brothers named Isaac, Ethan, Edmund and Horace.  He was the oldest of the five children.1 

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