What book contains a poem which, along with "Beowulf" and the "Anglo-Saxon Chronicle", preserves a legendary list of the kings of the Angles?
Kings of the Angles The Angles were a dominant Germanic tribe in the Anglo-Saxon settlement of Britain, and gave their name to the English, England and to the region of East Anglia. Originally from Angeln, present-day Schleswig-Holstein, a legendary list of their kings has been preserved in the heroic poems "Widsith" and "Beowulf", and the "Anglo-Saxon Chronicle".
Llefelys Llefelys (Middle Welsh orthography "Llevelys", "Lleuelys", "Llefelis") is a character in Welsh mythology appearing in the medieval Welsh tale "Cyfranc Lludd a Llefelys". In the tale, Llefelys is king of France while his brother Lludd is king of Britain. The tale appears in the Red Book of Hergest and the White Book of Rhydderch, the source texts for the "Mabinogion", and embedded into various versions of the "Brut y Brenhinedd", the Welsh adaptation of Geoffrey of Monmouth's "Historia Regum Britanniae".