His cousin Charles Carroll of Carrollton ( 1737 -- 1832 ) was also an important member of the Revolutionary Patriot cause .
Was the last surviving signer of the Declaration of Independence ( 1776 ) .
His cousin Charles Carroll of Carrollton ( 1737 -- 1832 ) was also an important member of the Revolutionary Patriot cause , and was the last surviving signer of the Declaration of Independence ( 1776 ) .