It's known as Norse paganism.
Norse paganism.
Norse paganism.
Norse paganism.
Norse paganism.
Yes. Norse paganism.
Norse paganism.
Norse paganism.
Yes, they believed in Norse paganism.
The Triple Horn of Odin is a symbol associated with Norse paganism and the worship of the god Odin. It is not connected to a specific organized religion but is typically used in modern Heathenry and Norse neopagan traditions.
Worldwide, probably a few thousand: http://en.wikipedia.org/wiki/Asatru#Demographics
The earliest religions that were brought to Iceland came from Irish Monks. The original religion in Iceland was Norse paganism.