Dierminevin (IPA: /ˌdaɪəmɪnˈɛvɪn/) is a landlocked petty kingdom located in the rugged uplands of north-eastern Epiros. Of the former Vasilian colonies of the north-east, Dierminevin is the largest in terms of area, but the smallest in terms of population, with no major cities. The population is predominantly Ardryn and the kingdom has become a refuge for those indigenous folk throughout Epiros (not only Ardryn, but also other nations) seeking to escape either ancestral enemies or Anatian oppression. A former Vasilian colony, Dierminevin's ruling house has long since mixed its blood with the indigenous peoples, leading many of Anatian descent to regard it as essentially an Ardryn kingdom.

Dierminevin has frequently quarreled with its neighbours, though the difficulty of the terrain has meant that few incursions have been made into its territory. The kingdom's most notable territorial losses came as a result of the expansion of Elsavet and the secession of Angouri Forest, which many suspect was sponsored by Anvero.