This must be the chronicle Brut y Tywysogion, although no extant medieval copy mentions Caradoc as its author.
The 16th-century Welsh antiquary David Powel claimed his Historie of Cambria as a continuation of this chronicle.
At the end of the 18th century, Iolo Morganwg wrote what he claimed was Caradoc's lost chronicle, Brut Aberpergwm.
Published in The Myvyrian Archaiology of Wales, this became one of the most best known of Iolo's numerous literary and antiquarian forgeries, which give the Morgannwg (Glamorgan) a central place in early and medieval Welsh history.
[3] J. S. P. Tatlock, in a 1938 article, throws doubt on the accounts of Caradoc of Llancarfan by T. F. Tout in the original The Dictionary of National Biography, and by Sir John Edward Lloyd in the Dictionary of Welsh Biography, saying that "even the late Professor Tout devotes most of his account... to statements certainly groundless, uses worthless authorities, and ignores or distorts the implications of what is reliably known.