“It is a curious fact,” says Chalmers, “which we learn from the Charters of the twelfth century, that the Scoto-Irish people substituted Inver for the previous Aber of the Britons. David I. granted to the Monastery of May _Inver-In_ qui fuit _Aber-In_ in Chart May.”(62) This remarkable place is at the “_Influx of a small stream_, called the _In_, on the coast of Fife. Both appellations are now lost.” Among the names of ancient Celtic regions we have Abrin-catui, that is (_without any change in the word_) Aber-In-Catui; the name of a Tribe in Normandy, about Avranches, which is at the mouth of a River now called the See. (Another stream flows into the same Estuary.) Aber—In—Cattui. Literally, “Estuary (of the) River—Tribes or People,” i.e. The Tribes living at the Estuary of the River or Rivers. ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ The name of the same place will also furnish an example of a corresponding term, primarily meaning “The Mouth,” in the modern Celtic. Genœ (_Welsh_), Ganau (_Cornish_), Gion (_Irish_), Genu (_Armorican_), mean “The Mouth.” The original name of “Avranches,” when the country was first subdued by the Romans, was In-“_gena_.” Here it is plain “Gena” was synonymous with Aber! The Town was afterwards called Aber-in-Catui by the Romans, who very generally gave the names of the Celtic tribes to their principal Towns. In D’Anville’s Map we find, in the same part of Gaul, _Aræ-genu_-s given to Bayeux, (the capital of the Bajocasses,) at the _mouth_ of a river now called the “Ayr!” The following are very striking examples of the occurrence of the same word, Genœ or Ganau: “Gano-durum” (Dur water) Constance, at the spot where the Rhine issues out of Lake Constance. “Geneva.” (The Rhone issues here from the Lake, and is immediately afterwards joined by the Arve.) “Genua” (Genoa). At the mouth of a stream. “Albium In-gaun-um,” a town to the east of Genoa, where many streams from the Maritime Alps unite in one mouth. Beal or Bel (_Irish_), Buel (_Manx_), “A Mouth.” This is another word, applied in Wales and Ireland, in topographical names, in nearly the same sense as Aber, as in Bala, at the mouth of a lake, North Wales, _Bally-shannon_, Ireland. This word does not occur either in vernacular Welsh or in the Welsh of old MSS. But in Irish, _Beal_ or _Bel_ is still the common word for “A Mouth.”