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  1. Testun rhagarweiniol

  2. 1.Enwi a dehongli

  3. 2.Y darpariaethau sy’n dod i rym ar 11 Ebrill 2025

  4. Llofnod

  5. Nodyn Esboniadol

  6. Nodyn Orchymyn Cychwyn Blaenorol