
Welsh word elfydd comes from Proto-Indo-European *álbʰos, Proto-Indo-European *h₂elbʰós (White.)
*álbʰos (Proto-Indo-European)
*h₂elbʰós (Proto-Indo-European)
White.
*albiyū (Proto-Celtic)
Britain. Alpine pasture. High mountain (especially in the Alps), alp. Luminous world, upper world, (the habitable surface of the) world.
*ėlβɨð (Proto-Brythonic)
World.
elbid (Old Welsh)
District. Earth. Land, country. World.
eluit (Middle Welsh)
eluit, eluyd (Middle Welsh)
elfydd (Welsh)