Today is the 221st anniversary of the birth of John Tyler, the 10th president of the United States, on January 25, 1790. Now, I’m sure you haven’t given a lot of thought to ol’ Jawn (best known as the back half of “Tippecanoe and Tyler, Too!”, he  succeeded William Henry Harrison upon the latter’s death in office one month after inauguration), but he has an extraordinary legacy: he has living grandchildren. According to Yahoo News:

So, how is it possible that a former president who died 150 years ago would still have direct descendents [sic–he means grandchildren–DSF] alive today? As it turns out, the Tyler men were known for fathering children late in life. And that math is pretty outstanding when added up:

John Tyler was born in 1790. He became the 10th president of the United States in 1841 after William Henry Harrison died in office. Tyler fathered Lyon Gardiner Tyler in 1853, at age 63.  Then, at the age of 71, Lyon Gardiner Tyler fathered Lyon Gardiner Tyler Jr. in 1924 and four years later at age 75, Harrison Ruffin Tyler. Both men are still alive today.

Think about that: John Tyler was born less than ten years after the end of the Revolutionary War, less than three years after the ratification of the Constitution, less than a year ater the inauguration of George Washington as our first president. That man has living grandsons, one of whom is only seven years younger than Ron Paul, who is running for president today. Incredible.