Reliable sources have not yet been found to confirm his existence.
Research Notes
Fabricated Line of Descent
Boyer shows Alcwn in a line of descent going back to Coel Hen ("King Cole"). [1] Wolcott's different birth estimates are appended in parentheses. [2]Stewart Baldwin, however, states that the genealogy which purports to make Gwriad a direct male-line descendant of Llywarch Hen is almost certainly a late fabrication.[3]
Coel Hen or Coel Godebog, lived about the year 370 (345)
Ceneu ap Coel Hen was born say 400 (380)
Gwrwst Ledlum ap Ceneu ap Coel Hen was born say 430 (415)
Meirchion Gul ap Gwrwst Ledlum ap Ceneu ap Coel Hen was born say 470 (445).
Elidir Lydenwyn ap Merchion Gul ap Gwrwst Ledlum ap Ceneu was born say 500 (485),
Llywarch Hen ab Elidir Lydenwyn ap Meirchion Gul ap Gwrwst Ledlum was born say 530 (520)
Dwg ap Llywarch Hen ap Elidir Lydewyn ap Meirchion Gul was born say 570 (560).
Gwair ap Dwg ap Llywarch Hen ab Elidir Lydenwyn, born say 600
Tegid ap Gwair ap Dwg ap Llywarch Hen was born say 630
Alcwn ap Tegid ap Gwair ap Dwg, born say 670
Sandde ab Alcwn ap Tegid ap Gwair, born say 700 married Celeinion ferch Tudwal ab Anarawd Gwalch-Crwn ap Merfyn Mawr, who was King of Man and reputedly a descendant of Macsen Wledig (Roman Emperor Maximus, who died 388.
Elidir ap Sandde ab Alcwn ap Tegid, born say 730
Gwriad ab Elidir ap Sandde ab Alcwn, born say 770.
Birth and Parents
Alcwn was born about 670, the son of Tegid ap Gwair. He was "of, , Southern Reged, England." The name of his wife is not known, but he is known to have had one son:
Sandde ab Alcwn
According to the FamilySearch Welsh database, Evans also "gives him a son named Owain, who in turn had a son Gruffudd, who had a son Maredudd, who had a son Madog, who had a son Maredudd "Fychan"."[4]
Birth: (The date of his birth varies: 635, 660, 670.)
Birth Place: Isle of Man, Wales, or North Wales[5]
South Rheged (Old North)
As shown in "The History Files" for the year 0790, Elidyr map Sandde map Alcwn map Tegid map Gwyar map Llywarch Hen is a direct descendant of the last British king of South Rheged. Elidyr's son, Gwriad, becomes king of Gwynedd in 815, still carrying the title, Heir to South Rheged. Physical control of the region, however, has long since fallen to Northumbria, although southern sections may be conquered by Mercia during its ascendancy around this time. [6]
Reign: Ynys Manaw
He was King of Ynys Manaw (Isle of Man) in about 680.[citation needed] (This is too early for a brith date about 660 or 670. Watt-266 23:50, 18 April 2015 (EDT))
A generation missing here - Elydyr was son of Sandde son of Alcwn.
Source
↑ Carl Boyer, 3rd. Medieval Welsh Ancestors of Certain Americans. Generally follows Bartrum. By the author: Santa Clarita, California, 2004. Coel Hen is #1 on page 63.
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