The constituency would also unite areas that form part of the Rhondda Cynon Taf principal council area into 1 constituency, building on the established links that exist.
Byddai’r etholaeth hefyd yn uno ardaloedd sy’n ffurfio rhan o ardal prif gyngor Rhondda Cynon Taf yn un etholaeth, gan ychwanegu at y cysylltiadau sefydledig sy’n bodoli.