According to William of Worcester

William Worcester

William Worcester , was an English chronicler and antiquary.-Life:He was a son of William of Worcester, a Bristol citizen, and is sometimes called William Botoner, his mother being a daughter of Thomas Botoner from Catalonia....

, writing in the fifteenth century, Cadoc (or Condor) was a survivor of the Cornish royal line

Kingdom of Cornwall

The Kingdom of Cornwall was an independent polity in southwest Britain during the Early Middle Ages, roughly coterminous with the modern English county of Cornwall. During the sub-Roman and early medieval periods Cornwall was evidently part of the kingdom of Dumnonia, which included most of the...

 at the time of the Norman Conquest of England

Norman conquest of England

The Norman conquest of England began on 28 September 1066 with the invasion of England by William, Duke of Normandy. William became known as William the Conqueror after his victory at the Battle of Hastings on 14 October 1066, defeating King Harold II of England...

 in 1066 and was appointed as the first Earl of Cornwall

Earl of Cornwall

The title of Earl of Cornwall was created several times in the Peerage of England before 1337, when it was superseded by the title Duke of Cornwall, which became attached to heirs-apparent to the throne.-Earl of Cornwall:...

 by William the Conqueror

William I of England

William I , also known as William the Conqueror , was the first Norman King of England from Christmas 1066 until his death. He was also Duke of Normandy from 3 July 1035 until his death, under the name William II...

.

According to the vernacular history of the Cornish and the Bodmin Manumissions the descendants of Cadoc lived on in the ancient areas of Pydar and Bodmin in Cornwall and included as a descendant Thomas Flamank

Thomas Flamank

Thomas Flamank was a lawyer from Cornwall who together with Michael An Gof led the Cornish Rebellion against taxes in 1497....

, the Bodmin lawyer, who together with Michael An Gof

Michael An Gof

Michael Joseph and Thomas Flamank were the leaders of the Cornish Rebellion of 1497....

 led the uprising

Cornish Rebellion of 1497

The Cornish Rebellion of 1497 was a popular uprising by the people of Cornwall in the far southwest of Britain. Its primary cause was a response of people to the raising of war taxes by King Henry VII on the impoverished Cornish, to raise money for a campaign against Scotland motivated by brief...

 that marched against the English all the way to London in 1497 and suffered death when the uprising was defeated. When faced with being sentenced to death Thomas Flamank is recorded in emulation of his legendary forbears, as having stated the immortal words "Speak the Truth and only then can you be free of your chains".

Cadoc was himself a descendant of King Doniert (King Donyarth

Donyarth

King Donyarth is thought to have been a 9th century King of Cornwall, now part of the United Kingdom.He is known solely from an inscription on King Doniert's Stone, a 9th century cross shaft which stands in St Cleer parish in Cornwall. His social status is not recorded there...

) whose ancient inscribed stone

King Doniert's Stone

King Doniert's Stone consists of two pieces of a decorated 9th century cross. The inscription is believed to commemorate Dungarth, King of Cornwall who died around 875....

is still to be found in southeast Cornwall.