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Male Jacob Jones Click to view Jacob Jones in the family tree

Jacob was born on September 20th, 1762.1   Jacob's father was Cornelius Jones and his mother was Sarah Sanford.  His paternal grandparents were John Jones and Abigail Holbrook; his maternal grandparents were Thomas Sanford and Sarah Unknown. He had five brothers and six sisters, named Daniel, Reuben, John, Oliver, Phineas, Sarah, Marah, Rebecca, Abigail, Mary and Hannah. He had three half-brothers and four half-sisters, named Cornelius, Daniel, Ezra, Alice, Lucy, Elizabeth and Sophia.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #3132, 3132.ftw