What would my Chinese name be pronounced in Japanese and Korean?

Actually can you guys give me the Chinese pronunciation too? I have no idea what it is, because I'm not Chinese but since I'm Viet, I converted it into Traditional Chinese. It is 阮玉珍. For you Chinese speakers, can it be a name?

is cantonese a language or an ethnicity?

so i met this guy. he's half viet and half chinese. but instead of saying chinese, he says cantonese-chinese. or something along those lines. because my other friend says she speaks cantonese and is catonese. or is it both?