Among the opposing representations, 23 proposed alternative arrangements including pairing Merthyr Tydfil and Aberdare with Rhondda and Ogmore and pairing Pontypridd with Cardiff West.
Ymhlith y cynrychiolaethau yn erbyn y cynnig, cynigiodd 23 drefniadau amgen gan gynnwys paru Merthyr Tudful ac Aberdâr â Rhondda ac Ogwr a pharu Pontypridd â Gorllewin Caerdydd.