The Northern Division consists of six Classes: Celtic, Italic, Illyric, Hellenic, Windic, and Teutonic.
The Celtic Class consists of two Branches: Cymric and Gadhelic.
The Cymric Branch consists of the dead language Cornish, and the living languages of Wales and Brittany.
The Gadhelic Branch consists of the living languages of Scotland, Ireland, and Man.
The Italic Class consists of the dead languages Oscan, Latin, and Umbrian, together called Lingua Vulgaris, or Langue d'oc and Langue d'oil, and the living languages of Portugal, Spain, Provençe, France, and Italy.
The Illyric Class consists of the living languages of Wallachia, the Grisons, and Albania.
The Hellenic Class consists of the dead Κοινή languages, Doric, Æolic, Attic, and Ionic, and the living language of Greece.
The Windic Class consists of three Branches: Lettic, South-East Slavonic, and West Slavonic.
The Lettic Branch consists of the dead language Old Prussian, and the living languages of Lithuania, Kurland and Livonia (Lettish).
The South-East Slavonic Branch consists of the dead language Ecclesiastical Slavonic, and the living languages of Bulgaria, Russia (Great, Little, White Russian), Illyria (Slovenian, Croatian, Servian).