Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Margam Estate (Wales), 2 canlyniadau
- Margam Abbey -- Archives., 1 canlyniadau
- Margam Estate (Wales) -- Archives., 1 canlyniadau
- Margam Abbey, 1 canlyniadau
- Penrice Estate (Wales), 1 canlyniadau
- Mansell family, Barons of Margam -- Archives., 1 canlyniadau
- Williams family, of Plas Dyffryn Clydach -- Archives., 1 canlyniadau
- Mansell family, Barons of Margam, 1 canlyniadau
- Williams family, of Plas Dyffryn Clydach, 1 canlyniadau
- Melincourt Furnace (Resolven, Wales), 1 canlyniadau
- Pob un
- Coal mines and mining -- Wales -- Glamorgan, 2 canlyniadau
- Manors -- Wales -- Glamorgan, 1 canlyniadau
- Manorial courts -- Wales -- Glamorgan, 1 canlyniadau
- Administration of estates -- Wales -- Glamorgan, 1 canlyniadau
- Bulls, Papal, 1 canlyniadau
- Abbeys -- Wales -- Margam, 1 canlyniadau
- Gower (Wales), 1 canlyniadau
- Iron industry and trade -- Wales -- Glamorgan., 1 canlyniadau
- Iron-works -- Wales -- Glamorgan., 1 canlyniadau
- Mines and mineral resources -- Wales -- Glamorgan, 1 canlyniadau
