Coblynau

No cosmogonic origin or creation myth for the coblynau is recorded in the supplied sources. Instead, accounts place them in the practical and narrative world of miners and quarrymen: they are folkloric spirits attached to the working landscape of mines and quarries and appear in miners' tales as unseen agents that make noises in passages and sometimes direct attention to mineral deposits. The available sources treat coblynau as part of miners' interpretive repertoire for explaining sounds, hazards, and occasional windfalls underground rather than as beings with a detailed origin myth.

The supplied materials consistently describe coblynau as "gnome-like" but provide no detailed physical description. Popular summaries and catalog entries compare them to small subterranean folk such as goblins or gnomes (the Archive description explicitly calls them a Welsh "Goblin"), and miners' narratives presume small, person-sized beings associated with underground workings; however, specifics such as stature, dress, coloration, or distinctive features are not recorded in the provided sources.

Sources report that coblynau haunt mines and quarries and are associated with audible knocking sounds in underground passages. Folkloric summaries and miner testimonies describe miners hearing knocks attributed to coblynau; secondary accounts also record stories in which coblynau directed miners toward riches in a mine. Beyond these behaviors—haunting specific worked places, producing knocks, and appearing in tales of guidance toward deposits—the provided sources do not ascribe further supernatural powers or capacities.