- domhan
- the Universe, so Irish, Old Irish domun, Gaulish Dubno-, Dumno- (in many proper names, as Dubnotalus, Dumnorix, "World-king", Gaelic Domhnall, *Dumno-valo-s, Welsh Dyfnual, Celtic *dubno-, the world, the "deep"; another form of domhain above. Cf. English deep for the "sea". D'Arbois de Jubainville explains Dubno- of Gaulish names as "deep", Dumnorix, "deep king", "high king"; and he has similarly to explain Biturix as "king for aye", not "world king": all which seems a little forced.
Etymological dictionary of the Gaelic language. Alexander Gairm Publications. 1982.