There is more than one artist with this name:
1) Törf is a Dutch folk group from the province of Groningen, in the Netherlands. It was founded in 1975. The songs they play are either based on historical research, or inspired by well-known poems from the province of Groningen. The lyrics are sung in the regional dialect.
The musical style is comparable with Loreena Mckennit and Pentangle. 2) Törf is a rather unactive thrash metal project from Finland.