Q. Which U.S. Presidents have been related to other office holders of the White House?

A. John Adams was the father of John Quincy Adams. William Henry Harrison was the grandfather of Benjamin Harrison. Theodore Roosevelt was a distant cousin of Franklin Delano Roosevelt. George Bush is the father of George W. Bush. Grover Cleveland is himself (as the 22nd and also 24th President, he might be considered to be "two" Presidents). He is the only individual to have held two terms of office separated by another President. There is no blood relationship between Andrew Johnson and Lyndon B. Johnson.