Findmypast.com has added about 18,000 records documenting the descendants of the fifty-six men who signed the United States Declaration of Independence. Quoting from the website,
These records document the descendants of these 56 men and offer a standardized lineage, which allows family historians to determine any possible connection to the Signers. The most famous is undoubtedly John Hancock, the President of the Continental Congress, who chose to sign in large letters. It is also signed by two future Presidents: Thomas Jefferson and John Adams. Benjamin Harrison V was the father and great-grandfather of two other presidents, Edward Rutledge was the youngest at age 26, and at age 70, Benjamin Franklin was the oldest. Many had familial connections to Britain, Ireland, Scotland and Wales.
The signers were:
Adams, John
Adams, Samuel
Bartlett, Josiah
Braxton, Carter
Carroll, Charles
Chase, Samuel
Clark, Abraham
Clymer, George
Ellery, William
Floyd, William
Franklin, Benjamin
Gerry, Elbridge
Gwinnett, Button
Hall, Lyman
Hancock, John
Harrison, Benjamin
Hart, John
Hewes, Joseph
Heyward Jr., Thomas
Hooper, William
Hopkins, Stephen
Hopkinson, Francis
Huntington, Samuel
Jefferson, Thomas
Lee, Francis Lightfoot
Lee, Richard Henry
Lewis, Francis
Livingston, Philip
Lynch Jr., Thomas
McKean, Thomas
Middleton, Arthur
Morris, Lewis
Morris, Robert
Morton, John
Nelson Jr., Thomas
Paca, William
Penn, John
Read, George
Rodney, Caesar
Ross, George
Rush, Benjamin
Rutledge, Edward
Sherman, Roger
Smith, James
Stockton, Richard
Stone, Thomas
Taylor, George
Thornton, Matthew
Treat Paine, Robert
Walton, George
Whipple, William
Williams, William
Wilson, James
Witherspoon, John
Wolcott, Oliver
Wythe, George
The images in this collection come from the Frank Willing Leach Collection, housed at the Historical Society of Pennsylvania.
According to Relative Finder (https://www.relativefinder.org/#/main) I am related to about 34 of the signers. I am assuming that one or two of these potential connections might be correct.