cymry

What Is The Difference Between Cymru And Gymru? The reason Cymru becomes Gymru is because the preposition ‘i’ causes certain nouns to mutate. In this case, the ‘c’ in Cymru mutates to ‘g’ to become Gymru. How do you pronounce Cymru Wales? How to Pronounce Wales in Welsh. Cymru is pronounced [ˈkəmri] in the south