Dún-ælf

According to the Old English Dictionary:

e;

dún-ælf

f. A mountain fairy :-- Þá castalidas nymphas, ꝥ synt dúnylfa þá þe wunedon on Elicona þǽre dúne, Angl. viii. 325, 27. Dúnælfa castalidas nymphas, Wrt. Voc. ii. 88, 84; 19, 22. Dúnelfa, 129, 33. dun-ælf