奇麗 (kirei) can either be used to mean "clean/tidy" or "pretty" depending on context. For example, 奇麗な部屋 (kirei na heya) would mean "clean room", but 奇麗な女 (kirei na onna) would mean "pretty woman".
Deniva does not mean anything in Japanese.
Didi does not mean anything in Japanese.
"Olga" is not a Japanese word or name, so it doesn't mean anything at all in Japanese. Did you mean, "What is the name "Olga" translated to in Japanese?"
The name 'Collin' does not mean anything in Japanese, but it can be written in Japanese as: コリン
Kaitlyn does not mean anything in Japanese, but can be written in Japanese as: ケイトリン
This does not mean anything in Japanese.
Krystle does not mean anything in Japanese, but can be written: クリスタル
It does not mean anything in Japanese, but can be written: マーラナ
what does it mean in English and i might have a chance of explaining it in Japanese
what does it mean in English and I'll find out what it means in Japanese for you
It does not mean anything in Japanese, but it can be written: ビンセント
The name Sandy does not mean anything in Japanese, but can be written: サンディー