Hugo, I must confess that I had been looking at the ruined church near Din Llugwy by Moelfre (Ynys Mon), and I was looking again at your picture and trying to link "Bryn Gwynt" etc. and other Welsh translations and Mrs. Gwynant, (who is a native of Abergele), walked past behind me and said "that's Tower Hill", and also confirmed the existence of the other Moelfre at the same time! So I cannot take the credit as I am an honourable man (and also she is still standing behind me!)