...In Breton (which with Welsh and Cornish belongs to the Brythonic branch of Insular Celtic languages), 'on [1] sea' is war vor (Welsh ar for), though the older form arvor is used to refer to the coastal regions of Brittany, in contrast to argoad (ar 'on/at', coad 'forest' ar goed ('coed' forest) for the inland regions.The Irish form is 'ar mhuir', the Manx is 'er vooir', and the Scottish form 'air mhuir'. However, in these languages the phrase means 'on the sea', as opposed to 'ar thír' or 'ar thalamh/ar thalúin (er heer/er haloo, air thìr/air thalamh) 'on the land'. These cognate modern usages suggest that the Romans first contacted coastal people in the inland region and assumed that the regional name Aremorica referred to the whole area, both coastal and inland. Read full entry

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