7th of 9 children of John Ferguson and Anne Briggs (ppg 10, 11). John is coded #5 among people in this source. He self-describes himself as the founder of his family in America (pg. 12); this account contains rich history of his forbears in Scotland. His father's first two marriages bore no children; John and other children were from his third wife (pg. 13). John notes that his father had 11 children, but that all lines but his own were extinct (pg. 13).
Notes that his father was over 50 when he, his eldest son, was born. (pg 12)
Grandfather was from northern Scotland and a member of the army of Duke of Marlborough, "in the Scots' Grays, through all Queen Anne's wars." Grandfather died when father was 3 years old, leaving a large family, a poor widow, and little to no familial connections to the extended family.
"...when my father and his brother were settled in Newport, Rhode Island, where they found a Captain Robert Ferguson, formerly commander of an English East Indiaman, a brother of Dr. Adam Ferguson, the historian, and an own cousin of my father an uncle." (ppg 12-13)