The family has a longer recorded heritage in politics, however. Their earliest notable ancestor is the thirteenth century Baron Robert II de Holland, also an ancestor to James Madison, Thomas Jefferson, George Washington, Ulysses S. Grant, and Winston Churchill. Some genealogists speculate that the Harrisons were Viking warriors of Norse origin, and that they arrived in England with Canute the Great. Other sources say that they are of Norman, Irish and Scottish descent.
His son, Benjamin Harrison Jr., fathered Benjamin Harrison III, who fathered Colonel Benjamin Harrison IV in 1693. His son is known in modern times as Benjamin Harrison V, a signer of the Declaration of Independence and a Governor of Virginia. A grandson, Edmund served as Speaker in the Virginia House of Delegates. For the next two centuries the Harrisons played a noteworthy role in American political history.
Benjamin Harrison VI was brother to General and President William Henry Harrison, who was the father of John Scott Harrison, an Ohio congressman. John Scott Harrison was the father of President Benjamin Harrison and is the only person to be both the son and the father of a U.S. president. President Benjamin Harrison was named after Benjamin Harrison V and John Scott Harrison's brother, Dr. Benjamin Harrison VII.