What is Clive's real name from Professor Layton?

In the game 'Professor Layton and the unwound future' there is a character called Clive who poses as a future version of the Luke from the present. Want more details on that? Play the game



But there is one thing I don't get. He has so many names. Clive, Legal (Luke), Klaus, it's really confusing. Which one is his real name?What is Clive's real name from Professor Layton?
This should not be at all confusing if you simply stick with what the game tells you

Once "Future Luke" is revealed as Clive, the game only refers to him as Clive (nowhere in the game is he referred to as both Clive and Klaus)

The character's two profile entries also refer to him as Clive

Where you're getting confused is looking up information online, which sometimes refers to the name Klaus, which is the character's name in the Japanese version of the game

Several characters (in all of the games) have different names between the Japanese and English versions (and in a few cases, even between the US and UK versions)

So, his real name simply depends on which version of the game you're playing

On a side note, "Legal Luke" is a name given to his "Future Luke" persona by fans (before they had played the game) to represent "Luke" as an adult (and therefore of legal age)What is Clive's real name from Professor Layton?
Luke because I have The Diabolical Box and he goes by Luke :)