Sources

Duagvegg 1747-55 Roy

Duaggbeg 1807 Arrowsmith

Uagbeg 1832 Thomson

’N Ũ’ag Robertson, p. 112

There is also Wagmore:

Duagmore 1747-55 Roy

Duaggmore1807 Arrowsmith

Uagmore 1832 Thomson

OS Namebooks refers to this as ‘the Wag’.

“The occasional place-name “Wag” or “Wagmore” occurring in their immediate vicinity [of some structures] seems to indicate their original designation, a term for which a derivation has been suggested in the Gaelic word uamh – a cave, with its diminutive uamheg – pointing to the fact that the completed structure under a roof must have presented a cave-like appearance.”  Curle, A. O., The Excavation of the “Wag” or Prehistoric Cattlefold at Forse, Caithness PSAS 1947