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Welsh môr
Proto-Brythonic *mor (inherited)
Proto-Celtic *mori (inherited)
Proto-Indo-European *móri (inherited)

English moor (cognate)
Welsh Morgan (cognate)
Welsh morfarch (compound)
Welsh draenog y môr (mention)
Welsh môr-grwban (compound)
Welsh môr-filltir (compound)
Welsh môr-forwyn (compound)
Welsh môr-ladrad (compound)
Welsh môr-leidr (compound)
Welsh cefnfor (affix)
Welsh morio (affix)
Welsh morwennol (compound)
Welsh moroedd (affix)
Welsh morfil (affix)
Welsh môr-lawes (mention)
Welsh tramor (compound)
Welsh morol (affix)
Welsh mordwy (compound)
Welsh moresg (compound)
Welsh Caerfyrddin (mention)
Welsh moryn (affix)
Welsh arfor (affix)
Welsh morlin (affix)
Irish muir (cognate)
Scottish Gaelic muir (cognate)
Manx mooir (cognate)