|The Booth brothers; John Wilkes, Junius, and Edwin|
When Abraham's son was falling between a moving train and the platform, John Wilkes' brother pulled him back on to platform. This happened a few months before the assassination took place.
Another odd coincidence is Robert Todd Lincoln's proximity to presidential assassinations. After his father's, he was eyewitness to Garfield's, and present at McKinley's. He later refused presidential invitations, saying "No, I'm not going, and they'd better not ask me, because there is a certain fatality about presidential functions when I am present." And no one was ever shot around him again.