Whats's in a name?

His nickname X is a common hypocorism for Y in his country. In X's case, it was created by his younger brother’s inability to pronounce “Y" when they were young.

X was a follower of the evangelical Rebirth in Christ Church and devout evangelical Christian. X became engrossed in religion at the age of 12: "I learnt that it is faith that decides whether something will happen or not."

X and Y, please.