Atlantias
Could not find Atlantiadum in Logeion dictionaries.
Atlantiadum Proper-name noun: feminine genitive plural of Atlantias
Atlantias, -ticus, -tigena, s. Atlās.
Atlantĭăs, ădis, f. , fille ou descendante dʼAtlas : Sil. 16, 136 ; Priap. 68, 23.