At least 3 bands are named Ragnarök (also see Ragnarok):
1) Swedish Progressive Folk Rock band founded in Kalmar, Sweden, 1972.
The original and founding members were Peter Bryngelsson, Henrik Strindberg and Staffan Strindberg, but over the years no less than 27 people have been involved in Ragnarök.
In 2008 their sixth album "Path" was released – their first album in 17 years.
2) Czech R.A.C. Band
3) A German progressive metal band who released demos in 1990 and 1992.