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Dewis pwnc arall neu clirio pob hidlydd.
Nid yw holl gynnwys y cyfrifia wedi'i ryddhau. Edrychwch am ddatganiadau sydd i ddod ar y calendr datganiadau. Fel arall, gallwch greu set ddata eich fun.
Rhyddhawyd ar: 03 March 2026 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 28 November 2023 | Gwybodaeth gorfforaethol
Definition of Welsh-speakers in household, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Rhyddhawyd ar: 26 January 2024 | Gwybodaeth gorfforaethol
Definition of Welsh household composition, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Definition of Welsh reading ability, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Definition of Welsh speaking ability, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Definition of Welsh understanding ability, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Rhyddhawyd ar: 13 June 2025 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 02 June 2023 | Gwybodaeth gorfforaethol
Definition of proficiency in English language, categories, and changes since the 2011 Census for use with research and analysis using Census 2021 data.
Rhyddhawyd ar: 10 October 2023 | Gwybodaeth gorfforaethol
Use these groups of categories to research and analyse Census 2021 main language (detailed) data.
