Atlantia

The sources show multiple independent origins for uses of 'Atlantia.' A classical attestation appears in name-lists as 'Atlanteia or Atlantia,' described in a disambiguation note as a Hamadryad nymph who consorted with Danaus (Wikipedia disambiguation). In modern usage the name is repurposed: Ally Condie's novel uses Atlantia as the underwater city setting of the story told by the protagonist Rio (Atlantia (novel) page); Battlestar media sources apply Atlantia as the name of one or more battlestars (Battlestar Wiki clones); organizations and groups (Kingdom of Atlantia in the Society for Creative Anachronism, Legio XXIV Media Atlantia for Nova Roma) adopt the name as a regional or unit designation (SCA pages, Nova Roma page); and Wikidata lists Atlantia as a genus of cnidarian (Wikidata entry). The provided materials do not trace these usages to a single traditional origin or a continuous mythic figure.

No single, consistent physical description is attested for an entity named 'Atlantia' in the provided sources. The classical form 'Atlanteia/Atlantia' is only recorded as a Hamadryad name without descriptive detail. In modern contexts 'Atlantia' denotes a place (the underwater city in the novel, with protagonist Rio described as 'from the underwater city of Atlantia' but without city visuals in the provided excerpt), vessels in science-fiction (battlestars named Atlantia), organizational regions (SCA kingdom insignia and awards pages reference the polity name), and a biological genus entry (Wikidata lists Atlantia as a cnidarian genus but the sources give no species morphology).

The cited sources do not ascribe supernatural powers, behaviors, or consistent agency to an 'Atlantia' entity. The only mythic attestation is a name-form categorized as a Hamadryad in a disambiguation note, which by typology places it among tree-nymph name-lists in Greek myth, but the provided materials do not supply any attributes, deeds, or powers specific to Atlanteia/Atlantia. Modern fictional and organizational uses function as place- or unit-names rather than descriptions of supernatural capabilities.