Updated: Feb 10, 2019
Here it is, links to how to say it, and the history of this village. See if you can pronounce it.
It certainly looks like the person who named this village in North Wales was drunk at the time. It is an actual place on Anglesey, the North West of Wales.
Fortunately it's a small village, just over 3,000 people - I couldn't imagine trying to tell a taxi driver where you wanted to go, unless that is you could pronounce it - and many have tried.
So give it a go and then Click this link to see what you should have said - this weather guy has gone down in history with 18m views of his perfect 'English' attempt.
In all seriousness, there's a lovely translation to this place name.
St Marys Church in the hollow of the white hazel near to
the rapid whirlpool of Llantysilio of the red cave
Wikipedia as always has the full story.