Details:<br /> Cyfeirlyfr hynod ddiddorol yn disgrifio rhai o fodau a chymeriadau mwyaf enwog a thrawiadol byd chwedloniaeth. Fedrwch chi ddweud y gwahaniaeth rhwng 'pwca' a 'bwca', 'bwbach' a 'bwci bo'? Na? Wel, mae help wrth law. Pan ddaeth Graham Howells o hyd i gyfres o lawysgrifau mewn ogof bellennig ym mynyddoedd sir Gâr, teimlai'n lled hyderus ei fod wedi darganfod gwaith Myrddin ddewin ein
15 points for every pound you spend
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