- Ivor Wynne Jones, journalist and author: papers 1950-2006 (WM 2205)
- Peboc Eastman, chemical manufacturers, Llangefni: collected photographs of works and staff (WSM 611)
- Anglesey Federation of Women's Institutes: additional records incl of the Beaumaris and Moelfre Womens Institutes, and the Cefni, Cybi, Eilian and Menai Groups (WD 3/827-69)
- Brynsiencyn Estate Trust: papers, mainly rel to dispersal of the estate 1953-67 (WM 226)
- Merched y Wawr Y Falli: records 1980-2000 (2004)
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Anglesey County Record Office/Archifdy Ynys Mon