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

Isaac was born on April 20th, 1731 in Bridgewater, Massachusetts.1   Isaac's father was Isaac Willis and his mother was Mary Gifford.  His maternal grandparents were William Gifford and Hannah. He had a brother named Seth.  He was the younger of the two children.1 

Family Details of Isaac's family with Rebecca Hayward

1 1987.ftw
Further source/citation:
World Family Tree Vol. 1, Ed. 1 @ Tree #1987