Nobody remember KLF? I guess what time is love is one of the best house/acid songs ever.

'The White Room' an early 90's Euro-House classic.

'Chill Out' use to be one of my favorite ambient discs...

...and it's technically 'The KLF'

With Chill Out they gives the name to a genre..

I hope your not implying that 'Chill Out' gave a 'chillout' genre reference. I think Chill Out is a commercial name for anything remotely downbeat or slightly ambient. If you want to know about the person that coined the term 'ambient' (for the context I'm speaking of) look at Brian Eno.

So...where the name Chillout comes from?

I don't know who 'initially' coined the phrase chillout, but as I said in my previous post, I believe it's just a commercial way of saying anything 'downbeat or ambient with a good groove'. That's why you see all these mix cds with various artists that say 'chillout'. It's not a genre, it's a general label for a few styles of electronic music.