Hi to All,
In the ancient Irish story of Art son of Conn, King Conn and then his son Art voyage to an island called the Land of Promise (Tir Tairngiri) and the Land of Wonders (Tir na nIngnad). This island is distinguished by its "fair fragrant apple-trees", its "wild apples".
The Land of Promise name, in the story of Eithne daughter of Curcog, is given as a synonym for Emhain or Emne Ablach, Ablach being the Old Irish word for apple trees.
Geoffrey of Monmouth, in calling Insula Pomorum/Insula Avallonis/Isle of Avalon the "Fortunate" Isle, would seem to have been evoking an Otherworld identical to that which King Morgan ruled. Might not the name Art have been associated with Arthur's name?
The only problem with this theory is that one has to account for Geoffrey naming Morgan's kingdom Avallonis, when in the story it is called Tir na nIngnad, the "Land of Wonders".
If one follows the Cornish coast north from the Camel where Arthur supposedly was mortally wounded, we arrive at Appledore, situated on a neck of land or headland jutting out into the confluence of the Taw and Torridge Rivers. According to Eilart Ekwall, this town was le Apildore in 1335 AD. The name is Old English and means... "Apple-tree". The Appledore in Kent has an identical origin, but much earlier recorded forms: Apuldre 893 (Anglo-Saxon Chronicle), Apeldres (Domesday Book).
Obviously, the Cornish name "Avalon" (Geoffrey’s Avallonis almost certainly derives from Cornish auallen, “apple-tree”; cf. Breton avallen, Welsh afallen, Celtic *aballon-/apple-orchard) was a suitable substitution for the English name Appledore. The "Insula" or island of Avalon/Appledore is being used in the same sense as isle is used in Isle of Purbeck, Isle of Portland, or Isle of Thanet. In other words, Geoffrey’s Isle of Avalon is the neck of land or headland of Appledore.