President John Tyler's Grandsons Are Still Alive

Here's the most amazing thing you'll ever read about our 10th president:
John Tyler was born in 1790. He took office in 1841, after William Henry Harrison died. And he has two living grandchildren.
Not great-great-great-grandchildren. Their dad was Tyler’s son.

How is this possible?

The Tyler men have a habit of having kids very late in life. Lyon Gardiner Tyler, one of President Tyler’s 15 kids, was born in 1853. He fathered Lyon Gardiner Tyler Jr. in 1924, and Harrison Ruffin Tyler in 1928.
We placed a somewhat awkward call to the Charles City County History Center in Virginia to check in on the Tylers.
After we shared this fact on Twitter in 2012, Dan Amira interviewed Harrison Tyler for New York Magazine. Lyon Tyler spoke to the Daughters of the American Revolution a while back. Snopes is also in on the fact.

February 15, 2016 -

  If my math is right John Tyler had  Lyon at 63 !!!!
Lyon had his sons at 71 & 75 !!!!!
  
    Found at mental floss