E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A sorceress, a pythoness; one skilled in numbers. Sorcery and Chaldean numbers are synonymous terms. The Anglo-Saxon rimstafas means charms or conjuration, and the Norse reim-kennar means one skilled in numbers or charms. Norna of the Fitful Head was a Reimkennar, a controller of the elements.