Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Haverfordwest (Williams & Williams), 2054 canlyniadau
- CMA: Calvinistic Methodist Archive, 1767 canlyniadau
- Dolaucothi Estate Records,, 546 canlyniadau
- Aberystwyth Shipping Records,, 544 canlyniadau
- Powis Castle Estate Records,, 518 canlyniadau
- Harpton Court Estate Records,, 385 canlyniadau
- Welsh Church Commission Papers,, 384 canlyniadau
- Tredegar Estate Records,, 370 canlyniadau
- Wynnstay Estate Records, 328 canlyniadau
- J. Glyn Davies Papers,, 310 canlyniadau
- Pob un
- Llyfrgell Genedlaethol Cymru = The National Library of Wales, 24186 canlyniadau
- Prifysgol Bangor, Archifau a Chasgliadau Arbennig, 11 canlyniadau
- Archifau Prifysgol Aberystwyth, 9 canlyniadau
- Archifau Richard Burton, Prifysgol Abertawe, 4 canlyniadau
- Prifysgol Cymru, Y Drindod Dewi Sant: Llyfrgell ac Archifau Roderic Bowen, 3 canlyniadau
- Pob un
- Welsh Baseball Association, 4 canlyniadau
- Edwards, Ifan ab Owen, 1895-1970, 3 canlyniadau
- Labour Party (Great Britain), 2 canlyniadau
- Wynne, Edward, 1681-1755, 2 canlyniadau
- League of Nations Union, 2 canlyniadau
- League of Nations Union. Welsh National Council, 2 canlyniadau
- Cleverdon, Douglas, 2 canlyniadau
- Longford, Jennifer, 1929-, 2 canlyniadau
- Edwards, Elin, Lady, 1868-1919, 2 canlyniadau
- John, Augustus, 1878-1961, 2 canlyniadau
- Pob un
- Gruffydd, R. Geraint, 13 canlyniadau
- Williams, J. E. Caerwyn (John Ellis Caerwyn), 9 canlyniadau
- University College of Wales (Aberystwyth, Wales), 7 canlyniadau
- Church in Wales. Diocese of Bangor, 4 canlyniadau
- Hughes-Parry, Haf, Lady,, 4 canlyniadau
- Great Western Railway (Great Britain), 3 canlyniadau
- Ormsby-Gore family, Barons Harlech -- Correspondence., 3 canlyniadau
- Owen family, of Brogyntyn, Clenennau, and Glyn -- Correspondence., 3 canlyniadau
- Garn Estate (Henllan, Denbighshire, Wales) -- Accounting, 3 canlyniadau
- Condry, William, 1918-1998, 3 canlyniadau
- Pob un
- Llanuwchllyn (Wales), 9 canlyniadau
- Education -- Wales, 5 canlyniadau
- Cardiff (Wales), 4 canlyniadau
- Clergy -- Appointment, call and election, 4 canlyniadau
- Aberystwyth (Wales), 4 canlyniadau
- Welsh language -- Usage, 4 canlyniadau
- Education, Bilingual -- Wales, 4 canlyniadau
- Llangollen (Wales), 3 canlyniadau
- Llanrhos (Wales), 3 canlyniadau
- Wales -- Politics and government -- 20th century, 3 canlyniadau
- Pob un
- Letters, 38 canlyniadau
- Clippings (Books, newspapers, etc.), 12 canlyniadau
- Minutes, 7 canlyniadau
- Radio scripts, 7 canlyniadau
- Diaries, 6 canlyniadau
- Accounts, 6 canlyniadau
- Corporate minutes, 6 canlyniadau
- Corporate minutes., 5 canlyniadau
- Adroddiadau, 4 canlyniadau
- Periodicals, 3 canlyniadau
