From Wiktionary, the free dictionary
(Latin-script letter names) llythyren; a, bi, ec, èch, di, èdd, e, èf, èff, èg, eng, aetsh, i/i dot, je, ce, el, èll, em, en, o, pi, ffi, ciw, er, rhi, ès, ti, èth, u/u bedol, fi, w, ecs, y, sèd (Category: cy:Latin letter names)