Among the opposing representations, 19 proposed alternative arrangements including pairing Bridgend with Aberafan Maesteg and pairing Vale of Glamorgan with Cardiff South and Penarth.
Ymhlith y cynrychiolaethau yn erbyn y cynnig, cynigiodd 19 drefniadau amgen gan gynnwys paru Pen-y-bont ar Ogwr ag Aberafan Maesteg a pharu Bro Morgannwg â De Caerdydd a Phenarth.