Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Snowdonia National Park (Wales), 2 canlyniadau
- Eisteddfod Genedlaethol Cymru, 1 canlyniadau
- Park and Croesor Slate Company -- Archives., 1 canlyniadau
- Merioneth (Wales). County Council., 1 canlyniadau
- Park and Croesor Slate Company., 1 canlyniadau
- Owen, Bob, 1885-1962 -- Archives., 1 canlyniadau
- Richards, Thomas, 1878-1962., 1 canlyniadau
- Council for the Preservation of Rural Wales, 1 canlyniadau
- CPRW (Organization), 1 canlyniadau
- Williams-Ellis, Cecily, 1899-1992 -- Archives., 1 canlyniadau
- Pob un
- Caernarvonshire (Wales), 2 canlyniadau
- Merioneth (Wales), 1 canlyniadau
- Historians -- Wales -- Archives., 1 canlyniadau
- Wills -- Wales -- Gwynedd., 1 canlyniadau
- Dissenters, Religious -- Wales., 1 canlyniadau
- Croesor (Wales), 1 canlyniadau
- Gwynedd (Wales) -- History -- Research., 1 canlyniadau
- Wales -- Emigration and immigration., 1 canlyniadau
- United States -- Emigration and immigration., 1 canlyniadau
- Land use, Rural -- Wales -- Gwynedd., 1 canlyniadau
