The only french YS I know is a 2016 band, 60's oriented.

Are you looking for specific informations about a 60's band unknown of me?

Yellowstone & Voice were from the 60's weren't they? But they weren't French though.

Hi Phillipe yes thats the one Im looking for if you have any more info that would be great

How about a Dutch version?

Yellowstone (3) ‎– Yellowstone
Label:
Not On Label (Yellowstone Self-released) ‎– none
Format:
CD, EP, Mini-Album
Country:
Netherlands
Released:
2011
Genre:
Rock, Pop
Style:

Tracklist
1 Chance 4:51
2 Show 6:31
3 Time (Is Irrelevant) 3:47
4 Broken Dreams 6:09
5 Inner Fire 5:13
Credits
Artwork By – Grafisch Lyceum Utrecht
Bass – Sjors Witteveen
Drums – Ronald Postma
Engineer – Wout de Kruif
Guitar – Floris Hagemans
Lead Vocals – Berndt Woest
Mastered By – Wout de Kruif
Producer – Wout de Kruif
Written By – Yellowstone (3)