Ancient Egypt, with Ancient Greek and Ancient Rome, was known for it's culture of Polytheism, belief in many gods. There were many gods such as Ra, the sun god and Bastet, the cat god. Mono, means one which is why Monotheism is the belief in one god.
Polytheistic, because that is the belief of two or more gods. Christians are monotheistic, because they only believe in one God. Examples of Egyptian gods: Ra, Isis, Osiris, Set
It seems like North Wales is in a separate area than the rest of the British Isles, but all ive seen was just "Wales" but I think that South Wales is part of it, but not North Wales.