Son of William Campbell (1743-1820) and Naomi Fowler (1739-1814)
They moved to Penna. shortly after being married and had 7 children: William, Polly, Sally, Ester, Thaddeus, Syrenus (Cyrenius?) and Wealthy.
William died in 1809 and it is suspected that Thankful died earlier than 1809, but have no proof.

Campbell ancestry as determined by Bruce Campbell is summarized as:
Charles 1696 Born in Scotland Came to USA in 1700+/-
Robert 1717 Born in Scotland ? wife - Mary Trumbull
William 1743 Born in Voluntown, CT
William 1769 Born in Ashford, CT ?
William 1791 Born in New Ashford, MA
Thaddeus 1798 Born in Clifford, PA
Adolphus 1841 Born in Wayne Co, PA
Julian 1889 Born in Tallmanville, PA
Bruce 1931 Born in Kirkwood, NY

Charles was was born in Arguileshire in the north of Scotland and consequently called a Scottish Highlander. He was a descendent of a Campbell who belonged to one of those powerful Scottish Clans that we read of in the history of Scotland. The Duke of Arguile whose name was Campbell, was the leader or head of the Clan and he had a Company of Eighty Chosen Men, and each man's name was Campbell and each man was 6 feet high or over. Their ancestor, according to the tradition, belonged to that Company, and it was for that Company that that sweet old Scot tune was composed - "The Campbells Are Coming”.