Here's something trivial along those lines... four heads on Mt Rushmore... When Washington was President, Jefferson was already alive, obviously, but was alive during Washington's time in office. Lincoln was born while Jefferson was President. And Teddy Roosevelt was alive (and pretty young) during Lincoln's time in office. Alas, Ronald Reagan's head belongs up there, but he was born in 1911, TR left office in 1909. :^)
Interesting indeed. And add Trump while we’re at it. :)