The history of Wales is filled with many kings and kingdoms, but the kingdom of Dyfed, formed from lands in Pembrokeshire and Carmarthenshire, had a very unique trait. This Welsh kingdom possessed an Irish dynasty, an attribute only found twice throughout Welsh history.
In this video I will be examining the history of this Irish kingdom in Wales in-depth, from the Celtic tribes that inhabited Wales to the Roman invasion, from the colonisation of this Irish dynasty to the incursions of the Vikings and the Anglo-Saxons, and we will see how such a unique piece of Welsh history came about, and how the history of Wales was forever changed by its actions.

Chapters:
0:00 - The Demetae
1:15 - The Romans
2:56 - Britain After Rome
5:14 - The Deisi
19:46 - The Last of the Deisi
26:22 - The Vikings and The Saxons

Sources:
Davies, W. (1982). Wales in the Early Middle Ages. Leicester University Press, pp.34, 55-56, 82-113, 131, 196.

Davies, J. (2007). A History of Wales. London: Penguin, pp.12-16, 25-41, 49-70, 83, 94.

Charles-Edwards, T.M. (2013). Wales and the Britons, 350-1064. Oxford: OUP, pp.15-20, 83, 114-117, 157, 168, 174-181, 189, 360-363, 425, 450-452, 465, 474-475, 487-496, 506-509, 569, 586, 659-662.

Maund, K. (2006). The Welsh Kings. 3rd ed. United Kingdom: The History Press Ltd, pp.23-31, 43, 46-50, 55-59, 62.

Walker, D. (1990). Medieval Wales. Cambridge University Pres, 2-3, 7, 15-16, 51.

Davies, W. (1990). Patterns of Power in Early Wales. Oxford: Clarendon, pp.2-5, 11, 19, 32-35, 67.

Bartrum, P.C. (1993). A Welsh Classical Dictionary : People in History and Legend up to about A.D. 1000. The National Library of Wales, pp.1, 4-5, 29, 95, 125, 164, 202, 286, 364, 373, 425, 442, 481, 495-496, 507, 508-509, 519, 536, 579, 591, 608, 629, 630, 633, 636, 684, 701, 707-708, 709.

Mac Cana, P. (1977). The Mabinogi. University of Wales Press, pp. 381-382.

Bromwich, R., Jarman, A.O.H. and Roberts, B.F. (1991). The Arthur of the Welsh. University of Wales Press, pp. 5-8, 120, 138.

Maps:
© OpenStreetMap contributors, licensed under CC BY-SA: https://www.openstreetmap.org/copyright
https://www.floodmap.net/

Music:
'Out of the Skies, Under the Earth', I Don't See the Branches, I See the Leaves', 'Readers! Do You Read?', 'CGI Snake', 'Wonder Cycle', 'Divider', 'John Stockton Slow Drag
', 'Oxygen Garden', 'Another Version of You', 'But Enough About Me, Bill Paxton' by Chris Zabriskie are licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/...

Source: http://chriszabriskie.com/dtv/

Artist: http://chriszabriskie.com/

Images:
Irish Flag: Cobber17, CC BY 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons

Welsh Dragon - Tobias Jakobs, CC0, via Wikimedia Commons

Hywel Dda - National Library of Wales (NLW), CC0, http://hdl.handle.net/10107/4400109 (p.13)

Stonehenge - Yale Center for British Art (YCBA), CC0, https://collections.britishart.yale.e...

Preseli Hills - Tony Holkham, CC BY 3.0, via Wikimedia Commons.

Carn Menyn - ceridwen, CC BY-SA 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons.

Romans - NLW
http://hdl.handle.net/10107/4806621 (p.20-21)

Leek - Raysonho @ Open Grid Scheduler / Grid Engine, CC0, via Wikimedia Commons

Cholera - Tom Kirn, Ron Taylor, Louisa Howard - Dartmouth Electron Microscope Facility, CC0, via Wikimedia Commons

Macsen Wledig - NLW
http://hdl.handle.net/10107/4387112 (p.12)

Dinas Bran - YCBA
https://collections.britishart.yale.e...

Cantrefi - XrysD, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons

Vexilloid - Ssolbergj, CC BY 3.0, via Wikimedia Commons

Ogham - Kermode, P. M. C., CC0, via Wikimedia Commons

Harleian Genealogies - John Morris-Jones, CC0, NLW - http://hdl.handle.net/10107/1393466 (p.4)

Irish Harp - Setanta Saki, CC0, via Wikimedia Commons

Hawarden Castle - NLW.
http://hdl.handle.net/10107/4690846 (p.94)

Cynan & Vortipor, Constantine, Maelgwn - NLW. http://hdl.handle.net/10107/4396654 (p.203,202,204)

David Schwimmer - Philippe Berdalle, CC BY-SA 2.0, via Wikimedia Commons

Voteporigis Stone - Edward Laws, CC0, NLW http://hdl.handle.net/10107/3010539 (p.304,309)

Arthur, CC0, via Wikimedia Commons

Cambriae typus, CC0, NLW http://hdl.handle.net/10107/4786141

Thunderstorm - YCBA, CC0, https://collections.britishart.yale.e...

Viking Ship - Ningyou, CC0, via Wikimedia Commons

Rhodri Mawr - NLW, CC0, http://hdl.handle.net/10107/4787807 (p.28)

Alfred - NLW, CC0, http://hdl.handle.net/10107/4672776

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