dd is like th in “breathe”.
f is like v; fflike English f.
The sound of ll is perhaps better not attempted by the English reader. It is a thickened l, something between cl and th.
Vowels as in Gaelic, but note that there are strictly no diphthongs in Welsh, in combinations of vowels each is given its own sound.
A
Abred. The innermost of three concentric circles representing the totality of being in the Cymric cosmogony—the stage of struggle and evolution, [333]
Abundance. See [Stone of Abundance]
Æda (ay´da). 1. Dwarf of King Fergus mac Leda, [247].
2. Royal suitor for Vivionn's hand;
Vivionn slain by, [287]