Well, I suppose you’d have to say it’s a very extended family, but I’d guess there is a good chance that we were related if you went back far enough… and it can also throw you somewhat when you hear on the radio that you have died:

Swiss-based marine explorer and inventor Jacques Piccard, who was part of the deepest submarine dive in history, has died at his home aged 86.

In 1960, Piccard and US co-pilot Don Walsh took a submersible developed by his father to the bottom of the Mariana Trench in the western Pacific.

BBC News: Deep sea submarine pioneer dies

Okay, I realise I didn’t know the chap, but we did have something rather significant in common. Plus, I hadn’t realised he was the Mariana Trench bloke, which is odd, ‘cos I’ve always been interested in those undersea trenches and stuff.