Einion ap Cadifor Fawr

Please see Darrell Wolcott: The Conquest of Glamorgan - Einion vs Iestyn ap Gwrgan; http://www.ancientwalesstudies.org/id121.html. (Steven Ferry, August 19, 2020.)

Please see Darrell Wolcott: The Conquest of Glamorgan - Further Notes; http://www.ancientwalesstudies.org/id226.html. (Steven Ferry, August 20, 2020.)

Please see Darrel Wolcott: The Family of Trahaearn ap Caradog; http://www.ancientwalesstudies.org/id240.html. (Steven Ferry, August 29, 2020.)

Please see Darrell Wolcott: Maredudd Gethin ap Lord Rhys; http://www.ancientwalesstudies.org/id213.html. (Steven Ferry, September 17, 2020.)

Please see Darrell Wolcott: Madog Danwr, Lord of Llangurig Parish; http://www.ancientwalesstudies.org/id285.html. (Steven Ferry, November 19, 2021.)

Please see Darrell Wolcott: Bleddyn ap Maenyrch, King of Brycheiniog; http://www.ancientwalesstudies.org/id313.html (Steven Ferry, March 2, 2023.)

Please see Darrell Wolcott: Ifor Bach, Lord of Senghenydd; http://www.ancientwalesstudies.org/id316.html (Steven Ferry, August 4, 2023.)

Please see Darrell Wolcott: How Bartrum 'Lost' Hywel ap Gruffudd ap Ifor Bach; http://www.ancientwalesstudies.org/id317.html (Steven Ferry, August 9, 2023.)

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Alternate possible familial connection:

The Einion who supposedly married Nest ferch Iestyn:

If we identify him as a son of Cadifor Fawr ap Collwyn, it would give us an additional linkage between the Dyfed and Glamorgan families and would not require a 16th century tale to explain how the family of a Gwynedd man (Einion ap Collwyn ap Tangno) ended up in Glamorgan. 

http://www.ancientwalesstudies.org/id121.html

[S2437] #4568 Welsh Genealogies, AD 300-1400 (1980), Bartrum, Peter C. (Peter Clement), (25 volumes, with supplements containing additions and corrections. [Wales]: University of Wales Press, 1980), FHL book 942.9 D2bp; FHL microfiche 6025561., vol. 3 p. 85; vol. 5 p. 301, 302, 315; vol. 6 p. 428; vol. 8 p. 542, 543; vol. 10 p. 783.

[S1257] #248 A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland Enjoying Territorial Possessions or High Official Rank; but Uninvested with Heritable Honors (1834-1838), Burke, John, (4 volumes. London: Published for Henry Colburn, by R. Bentley, 1834-1838), FHL book 942 D2bc., vol. 3 p. 466.

[S2197] #550 The history and antiquities of the county of Leicester, Nichols, John, (4 volumes, each in 2 parts. London : Printed by and for J. Nichols, 1795-1815), FHL X book 942.54 H2nic., 3rd ser. vol. 2 p. 1150.

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[S2424] #12647 Llyfr Baglan, or, the Book of Baglan, Compiled Between the Years 1600 and 1607: Transcribed from the Original Manuscript Preserved in the Public Library at Cardiff (1910), Williams, John, (London: Mitchell, Hughes and Clarke, 1910), FHL book 942.97/B1 D2w; FHL microfilm 104,835., p. 166.

[S2434] #2105 Heraldic Visitations of Wales and Part of the Marches Between the Years 1586 and 1613 by Lewys Dwnn (1846), Dwnn, Lewys; transcribed and edited with notes by Sir Samuel Rush Meyrick, (2 volumes. Llandovery: William Rees, 1846), FHL book 942.9 D23d; FHL microfilm 176,668., vol. 1 p. 29*, 49, 143; vol. 2 p. 63, 140*.

[S2420] #11886 The Golden Grove books of pedigrees (filmed 1970), (Manuscript, National Library of Wales manuscript number Castell Gorfod 7. Filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,349-104,351., book 1 p. A102; book 4 p. C471*; book 7 p. D893*; book 19 p. 26.

[S2411] #11915 British Genealogy (filmed 1950), Evans, Alcwyn Caryni, (Books A to H. National Library of Wales MSS 12359-12360D. Manuscript filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,355 and 104,390 item 2., book 1 p. 106, 125, 258; book 2 p. B7*; book 5 p. E26*; book 6 p. F123*; book 8 p. H21, 65.

[S712] #1039 Pedigrees of Anglesey and Carnarvonshire Families: with Their Collateral Branches in Denbighshire, Merionethshire (1914), Griffith, John Edwards, (Horncastle, England: W.K. Morton, 1914), FHL book Folio 942.9 D2gr; FHL microfilm 468,334., p. 264*, 391.

[S1800] #771 The History of the Princes, the Lords Marcher and the Ancient Nobility of Powys Fodog and the Ancient Lords of Arwystli, Cedewen and Meirionydd (1881-1887), Lloyd, Jacob Youde William, (6 volumes. London: T. Richards, 1881-1887), FHL book 942.9 D2L; FHL microfilms 990,213-990,214., vol. 6 p. 32*.

[S2420] #11886 The Golden Grove books of pedigrees (filmed 1970), (Manuscript, National Library of Wales manuscript number Castell Gorfod 7. Filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,349-104,351., book 12 p. K1377*; book 17 p. N2041.

[S2411] #11915 British Genealogy (filmed 1950), Evans, Alcwyn Caryni, (Books A to H. National Library of Wales MSS 12359-12360D. Manuscript filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,355 and 104,390 item 2., book 1 p. 258.

[S2411] #11915 British Genealogy (filmed 1950), Evans, Alcwyn Caryni, (Books A to H. National Library of Wales MSS 12359-12360D. Manuscript filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,355 and 104,390 item 2., book 1 p. 125; book 6 p. F123; book 8 p. H65.

[S2420] #11886 The Golden Grove books of pedigrees (filmed 1970), (Manuscript, National Library of Wales manuscript number Castell Gorfod 7. Filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,349-104,351., book 12 p. K1377.

[S2420] #11886 The Golden Grove books of pedigrees (filmed 1970), (Manuscript, National Library of Wales manuscript number Castell Gorfod 7. Filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,349-104,351., book 4 p. C471.

[S2420] #11886 The Golden Grove books of pedigrees (filmed 1970), (Manuscript, National Library of Wales manuscript number Castell Gorfod 7. Filmed by the Genealogical Society of Utah, 1950), FHL microfilms 104,349-104,351., book 7 p. D893.

G T Clark: The Genealogies of Glamorgan P. 131

Einion is sometimes referred to as the son of Collwyn