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Male Isaac Johnson Click to view Isaac Johnson in the family tree

Isaac was born in Great Amwell, Hertfordshire, England.1   Isaac's father was John Johnson and his mother was Mary Heath.  His maternal grandparents were William A. Heath and Unknown Heath. He had four brothers and five sisters, named John, Humphrey, Joseph, Joseph, Mary, Elizabeth, Susan, Sarah and Hannah.  He died on December 19th, 1675 in Roxbury, MA.2 

Family Details of Isaac's family with Elizabeth Porter

1 phelps.FTW @ Tree #0105
2 2655.ftw
Further sources/citations:
World Family Tree Vol. 2, Ed. 1 @ Tree #2655, World Family Tree Vol. 3, Ed. 1 @ Tree #3132, 3132.ftw, World Family Tree Vol. 22, Ed. 1 @ Tree #3104, 3104.ftw