A simple and obscure commune in the northern part of France 'Y' is a teeny tiny place with a teeny tiny name.
Its short name is derived from the main street layout, which is basically, three roads that are shaped like the letter 'Y', with the population peak in 1866, at a whopping 226 citizens. The town is currently occupied by less than 90 people.
The residents of white called themselves 'Upsilonians'. A slightly more complicated Verbiage that comes from the Greek letter 'Epsilon'. Which you guessed it looks like the letter 'Y'.
Normally, a small weird village like this would go mostly unnoticed but due to a technical error Y ended up on the radar of several genealogist enthusiasts, in the late 2000s.
When tracing, the ancient ancestors back to the death side on a popular ancestry website. All roads seem to lead to 'Y' or at least an unusually large amount of them. It appeared that the number of people who apparently died there was a Gargantuan, compared to the number of people who ever actually lived but it turned out that this was due to an error in the databases of the website users and thus the mystery of 'Y' was solved.