Y gwahaniaeth rhwng diwygiadau o "UMCA"

Ychwanegwyd 24 beit ,  6 blynedd yn ôl
*1983/84 - [[Karl Davies]]
*1984/85 - [[Aled Siôn]]
*1985/86 - [[
*1986/87 - [[
*1987/88 - [[
*1988/89 - [[
*1989/90 - [[Owain Rogers]]
*1990/91 - [[Llŷr Huws Gruffydd]]
*1997/98 - [[Gwydion Gruffydd]]
*1998/99 - [[Angharad Closs Stephens]]
*1999/200000 - [[Rhodri Jones]]
*2000/01 - [[Rob Davies]]
*2001/02 - [[Gwion Evans]]
*2009/10 - [[Steffan Prys Roberts]]
*2010/11 - [[Rhiannon Wade]]
*2011/12 - [[Tammy Grace Hawkins]]
*2012/13 - [[Carys Ann Thomas]]
*2013/14 - [[Mared Ifan]]
Defnyddiwr anhysbys