Violet Jessop may have had the best (or worst?) luck in the world. She was the only person to survive both the sinking of the Titanic and it's sister ship, the Britannic. She was also aboard the Olympic when it collided with a warship. Definitely check this one out if you want to read more about her life, as well as the more in-depth Passengers of the RMS Titanic page, which is kind of eerie.