Speaking of long generations (this probably belongs in the Weird History thread):
The 10th US President, John Tyler still has a living grandson.
John Tyler was born just after the Revolutionary War on March 29, 1790 in Charles City County, Virginia.
He was the "Tyler" in the famous "Tippecanoe and Tyler Too" slogan. Tippecanoe was a reference to Whig Presidential Candidate William Henry Harrison who was the hero of the Battle of Tippecanoe. The Harrison/Tyler ticket won the 1840 US Presidential Election but Tyler only served a month as VP due to Harrison catching pneumonia and dying.
Tyler thus served as US President from April 4, 1841-March 4, 1845 when he was 51-54 years old. He was a member of the Confederate Congress until just before his death in 1862 and he is the only US President to be laid to rest under a flag NOT of the US.
Tyler's first wife was his age and was First Lady when Tyler entered the White House but she died while her husband was President. Tyler then married Julia Gardiner while in the White House. Julia was born in 1820 so she was just 24 at the time while Tyler was 54. John Tyler and Julia Gardiner Tyler had 7 children including:
Lyon Gardiner Tyler was born to former President John Tyler and Julia Gardiner Tyler on August 24, 1853. Like his father, Lyon's first wife died and, again like his father, Lyon remarried to a much younger woman and had children in his old age. That included:
Harrison Ruffin Tyler was born November 9, 1928 when his father was 75. Harrison is now 96 years old.