Well... Su in Chinnese means respectful but just because a name starts with a "SU" does not mean that they all have the same meaning. The meaning of a name in Japanese is related to the character used for that sound rather than the sound itself. There are many characters that can be used to make the sound "SU" in Japanese. So there is no definitive answer to your question. Sorry!
ミスト /mi su to/ means 'mist' in Japanese, and it is not a name.
デニース /de nii su/ is the Japanese term of that name. It also means the one with trust.
ブルーラズベリー /bu ruu ra su pu be rii/. Essentially its the same word inserted into Japanese.
It's called アスパラガス /a su pa ra ga su/ in Japanese.
ビジネスマン /bi ji ne su man/ or 実業家 /ji tsu gyou ka/ would mean 'businessman' in Japanese.
The name Leslie in Japanese can be written as ใฌในใชใผ, which is typically pronounced as "Resurii."
ミスト /mi su to/ means 'mist' in Japanese, and it is not a name.
忍び /shi no bi/ and also ステルス /su te ru su/.
That is not a Japanese word, if you want the Japanese spelling of that name/title it would be ソスキア /so su ki a/.
The name Alexis doesn't mean anything in Japanese. It can be written in Japanese as: アレクシス (A-re-ku-shi-su)
デニース /de nii su/ is the Japanese term of that name. It also means the one with trust.
スカウト /su ka u to/ and also 斥候 /se-kkou/ mean scout in Japanese.
If you mean the word 'grace' itself transliterated into Japanese it would be グレイス /gu rei su/. If you mean an equivalent for it in Japanese you can use 優美 /yuu bi/.
ブルーラズベリー /bu ruu ra su pu be rii/. Essentially its the same word inserted into Japanese.
I'm not sure whether I'm on the right track if li su is a name i'd say its Chinese or Korean not Japanese and as for its meaning i'd need the characters for the meaning if its the Japanese owrd risu (pronounced lisu) that is squirrel
It's called アスパラガス /a su pa ra ga su/ in Japanese.
If you mean transliteration of the word into Japanese, it would be グレイス /gu rei su/. Romanization of it would be 'gureisu'.