The Barddas of Iolo Morganwg, Vol. I., ed. by J. Williams Ab Ithel, , at sacred-texts.com
There are five primordial elements, namely: earth; water; air; fire; and nev. From the first four comes every inanimate matter, and from nev God, and all life, and all living things, and from the union of these five, comes every thing, whether it be animate or inanimate.
In another Book, thus:--
There are five elements, from which proceeds every thing, existing and living, whether it be animate or inanimate,
p. 382 p. 383
namely: calas; fluidity; air; uvel; and nwyvre. The first four are dead, and the fifth is alive; and from the fifth are God and all life.