Hi, sorry I’ve been away so long, but couldn’t get online at all yesterday. Congratulations Chavardz you did indeed get the correct answer - well done!
You did ask for a question that involved web searching and a bit of deduction, I hope I delivered 
Also, apologies for my abobnimal spilling 
I am not aware of it being official in a European country.
In other words it isn’t official in the country of it’s origin?
(sorry to drag it out, but I’ve been known to get these simple things wrong, you know )
Yes, I don’t think it is official in the country of it’s origin. (Ie, don’t look in Europe.)
Oh, my preliminary search for it in its country of origin says that it isn’t the official religion of the country of origin.
Well, Voodoo is recognised as an official religion in Haiti but I believe originated in Africa - I haven’t found a reference as to whether is is official or not in Africa though
This list would indicate that it’s not official in Africa.
This is my best guess so far - will try again tomorrow
Voodoo is not the one. Voodoun originated in Africa, not Europe. Good guess though.
Hmm, I see that my previous clue was awkward. The pagan religion in question originated in Europe and travelled to the other country (can’t say that country as it will give it away) where it survived underground. It was eventually made one of the two official religions of this country. The other official religion is a Christian one.
Hint 2: For it to survive so long and not be extinguished by Christianity, this country has to be fairly isolated.
Could it be Scientology?
How about Gaia?
Not Scientology. Following the pagan paths was a good start.
If you are unaware of some of the main pagan path’s you can find them at the pagan path selector’s webpage. However, I don’t believe that will tell you where it became one of the official religions of said country.
Santeria?
Hmm, never mind, that seems to be african…
Santeria is not a European religion. It had it’s roots in Africa and is along the voodoo branch. Depending on which version you follow (I believe Haitian and South American… I think) you could have the inclusion of Catholic Saints as Orisha. I am not well versed in it though.
Damn, I don’t want to kill this thread. So…the island nation was a good thread to follow. So think, Island nation inhabited by Europeans but isolated.
Dorkus, you have some funny friends.
Wait… is it an island inhabited by europeans, or an island in Europe?
Sunni Muslim?