Pupils aged 5 to 11 in primary schools who speak Welsh at home or who are fluent in Welsh, January 2018, file type: ODS, file size: 76 KB
Disgyblion rhwng 5 ac 11 oed mewn ysgolion cynradd sy'n siarad Cymraeg gartref neu sy'n rhugl yn y Gymraeg, Ionawr 2018, math o ffeil: ODS, maint ffeil: 76 KB