Thread:Juraj103/@comment-27075564-20180819210621/@comment-24448826-20181015071231

This is the "Spanish/Spaniard" case of demonym. At a few very rare occasions, TW3 uses Skelligan in dialogues when referring to items. Other times it's simply "Skellige [item name]" or Skelliger if person (apparently Skelligirl when female). Standalone G and TB makes it clear "Skelliger" is for people, "Skelligan" an adjective.