Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Ynysymaengwyn Estate (Wales) -- Archives., 1 canlyniadau
- Ynysymaengwyn Estate (Wales), 1 canlyniadau
- Maesypandy Estate (Wales) -- Archives., 1 canlyniadau
- Abergynolwyn Slate & Slab Co., 1 canlyniadau
- Maesypandy Estate (Wales), 1 canlyniadau
- Ruthin British School., 1 canlyniadau
- Talyllyn Railway., 1 canlyniadau
- Jones, J. D. (Joseph David), 1827-1870 -- Archives., 1 canlyniadau
- Jones, H. Haydn (Henry Haydn), Sir, 1863-1950 -- Archives., 1 canlyniadau
- Jones, J. D. (Joseph David), 1827-1870., 1 canlyniadau
- Pob un
- Slate industry -- Wales -- Merioneth., 4 canlyniadau
- Slate industry -- Wales -- Caernarvonshire., 2 canlyniadau
- Politicians -- Wales -- Archives., 1 canlyniadau
- Merioneth (Wales), 1 canlyniadau
- Slate industry -- Wales, North., 1 canlyniadau
- Abergynolwyn (Wales), 1 canlyniadau
- Montgomeryshire (Wales)., 1 canlyniadau
- Schools -- Wales -- Gwynedd., 1 canlyniadau
- Tal-y-llyn (Gwynedd, Wales), 1 canlyniadau
- Aberdovey (Wales), 1 canlyniadau