That for most of 1811 and 1812 my Royal Marine great great great grandfather James Entwistle* served on the same ship (HMS Briseis) as future polar explorer James Clerk Ross, then 12 years old. He (Ross) currently has 4 places in the Arctic named after him, as well as 4 in the Antarctic, a seal, a gull, a ship and a mountain. And a crater on the Moon.
*For reasons I'm yet to discover, three of the marines on HMS Briseis (out of about 20) were called James Entwistle. None has anything named after him as far as I am aware.