Thank you, it is when you try pronouncing the different names:
Welsh has a slightly different alphabet from English:-
C - pronounced as a K, as in English 'kick' eg: Caernarfon (kyre-nar-von).
CH - pronounced as in the Scottish 'loch' and the composer Bach.
DD - pronounced TH, as in English 'breathe' eg: Beddgelert (beth-gell-airt).
G - pronounced as a hard G, as in English 'get' eg: Beddgelert (beth-gell-airt).
LL - roughly pronounced THL eg: Llanberis (thlan-ber-ris).
F - pronounced as a V, as in English 'of' eg: Felindre (veh-lin-dray).
FF - pronounced as an F, as in English 'off' eg: FFestiniog (fest-in-yog).
W - pronounced as an OO, as in English 'swoon' eg: Llanrwst (thlan-roost).
Y - has two different pronunciations. In all but the last syllable of a word it's pronounced as a 'U' - as in English 'fun'. When it is in the last syllable of a word it is pronounced as an 'i' - as in English 'is'. For example, the Welsh for mountain is mynydd (mun-ith); the Welsh for mountains is mynyddoedd (mun-uth-oith). Because it no longer occurs in the last syllable, the sound of the second y changes from 'i' to 'u' (also, notice the emphasis moves along to the new penultimate syllable). In single syllable words, the Y is unpredictable!
Which roughly translates as:-
The Church of St. Mary by the pool with the white hazel near the fierce whirlpool by St. Tysilio's church and the red cave.