JOHNSON / ADAMS / HARRISON
If you said, "Three men who were president," you were very close.
The answer is, "Six men who were president."
| John Adams | 1797-1801 | 
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| John Quincy Adams | 1825-1829 | 
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| William Henry Harrison | 1841 | 
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| Andrew Johnson | 1865-1869 | 
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| Benjamin Harrison | 1889-1893 | 
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| Lyndon Johnson | 1963-1969 | 
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MORE TRIVIA:
- John Quincy Adams was the son of John Adams.
- George W. Bush was the son of George H. W. Bush.
- Benjamin Harrison was the grandson of William Henry Harrison.
- Franklin Delano Roosevelt was a distant cousin of Theodore Roosevelt.
- Lyndon Johnson was no relation to Andrew Johnson, as far as I know.
(Sort by "Last" in the table below.)