the welsh renderings are not straightforward translations in the modern sense, but by contemporary standards, they are generally close to their latin source text, with only some commentary or additional material from bardic traditional lore ("cyfarwydd") appended to the text. importantly, several manuscripts include a version of the tale known as "lludd and llefelys" inserted in the segment about lludd llaw eraint; the presence or absence of this tale has been used to classify the early versions of the "brut". one notable area in which welsh translators have corrected or adapted geoffrey based on native traditions is that of personal names and sobriquets. geoffrey's "hely", for instance, was substituted for beli mawr, an ancestor figure who also appears in "branwen ferch llŷr" and elsewhere in middle welsh literature.