. . "It's happened twice: John Adams was president number two, and his son John Quincy Adams was president number six. And of course recently we had George Bush (#41) and George W. Bush (#43)."@en . . "It's happened twice: John Adams was president number two, and his son John Quincy Adams was president number six. And of course recently we had George Bush (#41) and George W. Bush (#43)."@en . . . . "How many presidents have been father and son"@en .