On other webpages I have documented how my genealogy traces back to the MacArthurs (on my father’s side) and the Campbells (on my mother’s side), and that both of these lines are really part of one family.
As documented at http://christophergwinn.com/arthuriana/arthurs-pedigree/ , Campbell genealogy traces back to King Arthur and his ancestors. The name MacArthur means “son of Arthur”. The Campbells trace their descent from Arthur and earlier as described below:
“Scottish Campbell family genealogies
Leabhar Geinealach / Book of Genealogies – Dubhaltach mac Fhirbhisigh – c. 1650
Killbride version NLS MS 72 – c. 1530-1558
NLS MS 72 – c. 1467
To read more about the above genealogical list see Appendix VIII of the book at https://books.google.com/books?id=SRI5AQAAMAAJ&pg=PA460&lpg=PA460&dq=briotus&source=bl&ots=Ovvlb1DAj_&sig=s2NfjFXx3S_GDhiGLlbwujoyhWw&hl=en&sa=X&ved=0ahUKEwiv48awxsPYAhWGz4MKHQKeAacQ6AEIQzAE#v=onepage&q=briotus&f=false .
The history of King Arthur and the Britons is described in Nennius’ history and Geoffrey of Monmouth’s History of the Britons.
Here are excerpts from Nennius’ work found at http://www.yorku.ca/inpar/nennius_giles.pdf :
“The Britons were thus called from Brutus: Brutus was the son of Hiscion…Flisa of Juuin, Juuin of Japheth…the magnanimous Arthur, with all of the kings and military force of Britain, fought against the Saxons…”
The complete quote from Nennius traces Brutus’ ancestry back to Dardanus of Troy, and further back to Juuin (ie, Javan), son of Japheth.
Geoffrey of Monmouth’s History of the Britons, as summarized at http://www.ldolphin.org/cooper/ch5.html, outlines their history to King Arthur and afterwards. The summary is:
“…Brutus founded the city of Trinovantum, or New Troy, which was later to become the city of London. Brutus, the first king of the Britons, reigned over his people in this island for twenty three years, i.e. from ca 1104-1081 BC…Uther Pendragon was seducing Ygerna. But of their union was born the most famous of the British kings, Arthur, who reigned over the Britons from ca AD 521-542…”
A genealogical summary from Brutus to King Arthur can be found at https://www.gutenberg.org/files/37848/37848-h/37848-h.htm . More is posited here: https://books.google.com/books?id=K-BnCwAAQBAJ&pg=PT48&lpg=PT48&dq=brutus+hiscion&source=bl&ots=9_5gSYTa08&sig=EIKF4y-9i6IXf19nCdWPeD33BgM&hl=en&sa=X&ved=0ahUKEwiBvdm4_ufYAhUSKKwKHTBVDDwQ6AEIOTAC#v=onepage&q=brutus%20hiscion&f=false .