Coat of arms of Wales

The blazon

ar. a chev. betw. three boars heads, couped, sa. — Crest, a boar s head, couped, sa. langued gu. and tusked or, transfixed by a dagger ppr. Ednoivain ap Bradwen, [Merionethshire,] gu. three snakes, nowed in a triangular knot ar.

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.