Watt isn't rare, it's quite a common name in Scotland, for instance James Watt invented the steam engine, & revolutionised the garment industry, & there must be many of this name who emigrated to the States & many other countries, try entering the name on Google, you'll be surprised!.
Hmmm, yes, but I think the original joke, [not his made-up one] used last names, like this; "Three men, the first one's name is Smith, the second was Jones, What [Watt] was the name of the third?"
no i just was saying that is how, at least i, pronounce what, like for for dumb, u dont say dumb, u say dum. u dont pronounce the B, in what, u say it like wut. that is all i was saying. is that the 2 dont sound that same.