Legendary History Prior to 1st Century BC
Beli Mawr and Llyr Llediath in Welsh Pedigrees
The Bartrum "Welsh Genealogies"
Bartrum's "Pedigrees of the Welsh Tribal Patriarchs"
A study in charting medieval citations
The Evolution of the "Padriarc Brenin" Pedigree
Generational Gaps and the Welsh Laws
Minimum Age for Welsh Kingship in the Eleventh Century
The Lands of the Silures
Catel Durnluc aka Cadell Ddyrnllwg
Ancient Powys
The Royal Family of Powys
The Royal Family of Gwynedd
The 5 Plebian Tribes of Wales
Maxen Wledig of Welsh Legend
Maxen Wledig and the Welsh Genealogies
Anwn Dynod ap Maxen Wledig
Constans I and his 343 Visit to Britain
Glast and the Glastening
Composite Lives of St Beuno
Rethinking the Gwent Pedigrees
The Father of Tewdrig of Gwent
Another Look at Teithfallt of Gwent
Ynyr Gwent and Caradog Freich Fras
Llowarch ap Bran, Lord of Menai
Rulers of Brycheiniog - The Unanswered Questions
Lluan ferch Brychan
The Herbert Family Pedigree
Edwin of Tegeingl and his Family
Angharad, Heiress of Mostyn
Ithel of Bryn in Powys
Idnerth Benfras of Maesbrook
Henry, the Forgotten Son of Cadwgan ap Bleddyn
The Muddled Pedigree of Sir John Wynn of Gwydir
The Mysterious Peverel Family
The Clan of Tudor Trevor
The Other "Sir Roger of Powys"
Ancestry of Ieuaf ap Adda ap Awr of Trevor
The Retaking of Northeast Wales
Hedd Molwynog or Hedd ap Alunog of Llanfair Talhearn
"Meuter Fawr" son of Hedd ap Alunog
The Medieval "redating" of Braint Hir
Aaron Paen ap Y Paen Hen
Welsh Claims to Ceri after 1179
The Battle of Mynydd Carn
Trahaearn ap Caradog of Arwystli
Cadafael Ynfyd of Cydewain
Maredudd ap Robert, Lord of Cedewain
Cadwgan of Nannau
Maredudd ap Owain, King of Deheubarth
What Really Happened in Deheubarth in 1022?
Two Families headed by a Rhydderch ap Iestyn
The Era of Llewelyn ap Seisyll
Cynfyn ap Gwerystan, the Interim King
The Consorts and Children of Gruffudd ap Llewelyn
The 1039 Battle at Rhyd y Groes
The First Wife of Bleddyn ap Cynfyn
Hywel ap Gronwy of Deheubarth
The Brief Life of Gruffudd ap Maredudd
Owain Brogyntyn and his Family
The Other Gwenwynwyn
Eunydd son of Gwenllian
Sandde Hardd of Mortyn
The Floruit of Einion ap Seisyllt
The Enigmatic Elystan Glodrydd
The Unofficial "History" of Elystan of Powys
Cowryd ap Cadfan of Dyffryn Clwyd
Owain ap Cadwgan and Nest ferch Rhys - An Historic Fiction?
The "sons" of Owain ap Cadwgan ap Bleddyn
The Betrayal by Meirion Goch Revisited
Gwyn Ddistain, seneschal for Llewelyn Fawr
The Men of Lleyn - How They Got There
Trahaearn Goch of Lleyn
Einion vs Iestyn ap Gwrgan - The Conquest of Glamorgan
The Royal Family of Glamorgan
Dafydd Goch ap Dafydd - His Real Ancestry
Thomas ap Rhodri - Father of Owain "Lawgoch"
The "Malpas" Family in Cheshire
Einion ap Celynin of Llwydiarth
Marchweithian, Lord of Is Aled, Rhufoniog
Osbwrn Wyddel of Cors Gedol
Bradwen of Llys Bradwen in Meirionydd
Ednowain ap Bradwen
Sorting out the Gwaithfoeds
Three Men called Iorwerth Goch "ap Maredudd"
The Caradog of Gwynedd With 3 Fathers
Who Was Sir Robert Pounderling?
Eidio Wyllt - What Was His Birthname?
The Legendary Kingdom of Seisyllwg
The Royal Family of Ceredigion
Llewelyn ap Hoedliw, Lord of Is Cerdin
The Ancestry of Owain Glyndwr
Welsh Ancestry of the Tudor Dynasty
Gruffudd ap Rhys, the Homeless Prince
The Children of Lord Rhys
Maredudd Gethin ap Lord Rhys
The 'Next Heir' of Morgan of Caerleon
Pedigree of the ancient Lords of Ial
The Shropshire Walcot Family
Pedigree of "Ednowain Bendew II"
Pedigree of Cynddelw Gam
                                             by Darrell Wolcott
         Designated as the head one of the 15 Noble Tribes of Gwynedd, Marchweithian was born c. 1015/20.  In a previous paper[1], we identified him as a first-cousin of Collwyn ap Tangno and descended from Pasgen ap "Urien Rheged"....not the 6th century Urien from Rheged in northwest Britian, but a 9th century Urien descended from Cunedda.
         The early family which descended from Marchweithian has been charted by the leading Welsh genealogists with two opposing views: those that make Heilyn Gloff the 5th generation after Marchweithian, and those place him in the 6th following generation.  These competing views show the following descents:
                  Peniarth 127, 119                Peniarth 128, 257
                    Marchweithian                     Marchweithian
                             l                                       l
                     Marchwystl                         Marchwystl
                             l                                       l
                       Ystrwyth                            Ystrwyth
                             l                                       l
                       Cadwgan                             Tangno
                             l                                       l
                       Cynddelw                              Tyfid
                             l                                       l
                          Tyfid                             Heilyn Gloff
                     Heilyn Gloff
         While there are other citations which agree with the two sources we cited[2], these two are representative of the competing views.  Peter Bartrum's solution was to "correct" the shorter list by assuming (a) Tangno and Cadwgan were a single man, and (b) the shorter list had omitted Cynddelw in error. Our work, however, finds that subsequent descendants and their cited spouses require two men named Heilyn ap Tyfid born a generation apart.  Which of the two men named Heilyn also bore the nickname "Gloff" is not known since most citations add it to any Heilyn ap Tyfid, but it is unlikely both men were lame.
          Additional evidence that both groups of citations are correct, and depict two separate branches of the family, can be found in the 1334 Survey of Denbigh.  In that manuscript[3], we find lands called Villa Carwedfynydd contained two gavellas:  Gavella Heilyn ap Tyfid and Gavella Elidyr ap Tyfid.  No doubt once called Wele Ystrwyth ap Marchwystl, the lands had subsequently been divided into gavellas bearing the names of men descended from Ystrwyth.  But this Heilyn ap Tyfid was NOT a brother of Elidyr ap Tyfid.  The 1334 holders of gavella Elidyr ap Tyfid can, by chronological analysis, be seen to be one generation farther removed from Marchweithian than the holders of gavella Heilyn ap Tyfid:
                                GAVELLA ELIDYR AP TYFID
                                       1080  Ystrwyth
                                       1110  Cadwgan
                                      1140  Cynddelw
                                         1175  Tyfid
                                         1210  Elidyr
                                      1245  Tegwared
                            l                                           l
          1280  4 named brothers*                1275  Dafydd
                                                          1305  Cynwrig*
             *living in 1334
              In the above chart, the 4 named sons of Tegwared[4] were still living in 1334, but their brother Dafydd had died and his part of the gavella was held by an adult son, Cynwrig ap Dafydd.  Another brother of Tegwared, he named Gronwy, also had two sons living in 1334 [5] and a third son dead but represented by Ieuan ap Llewelyn ap Gronwy. 
             Now compare this with the men holding the other gavella:
                                 GAVELLA HEILYN AP TYFID
                                       1080  Ystrwyth
                                       1115  Tangno
                                        1145  Tyfid
                                        1180  Heilyn
                                      1210  Llywarch
                                       1245  Cynwrig
                     l                             l                         l   
 1280  2 named sons*[6]     1275  Einion      1275  Cynwrig Goch
                                                   l                         l
                             1305 3 named sons*[7]  1310 2 named sons*[8]
           *living in 1334
          Again, we find two generations of adult men alive in 1334, the older generation plus sons of their deceased brothers.  The same pattern exists for a cousin family descended from Einion ap Llywarch ap Heilyn, except that all 3 of that Einion's sons [9] were dead by 1334 and their lands held by each of their sons born c. 1300/1310.
         In both gavellas, the only workable pedigree construction which allows the men alive in 1334 to be descended from a man named Tyfid is by acknowledging there were two such men, one born c. 1145 and another born c. 1175.  Surely Bartrum recognized there was something amiss in his charts (which show only the c. 1175 Tyfid) when he portrayed a number of descendants as born c. 1330 yet noted they were adults alive in 1334.[10]
          When we look at the family descended from each Tyfid, we find a string of same-named men born a full generation apart:
                     1145  Tyfid                     1175  Tyfid
                                l                                    l
                     1180  Heilyn (a)               1205  Heilyn (a)
                                l                                    l
                   1210  Llywarch                1240  Llywarch
                                l                                    l
                   1245  Cynwrig                  1270  Cynwrig
                                l                                    l
             1280  Cynwrig Fychan          1300  Cynwrig Fychan
                                l                                    l
                    1310  Heilyn (b)                   1335  Heilyn (b)
                                        l                                    l
                  1340  Gruffudd (c)              1365  Gruffudd (c)
                                l                                    l
                    1370  Dafydd [11]            1400  Dafydd [12]
         (a)  One of these men was nicknamed "Gloff" but probably not the other
           (b)  One of these men was nicknamed "Frych" but probably not the other
           (c)  One of these men was nicknamed "Llwyd" but possibly not the other
                 While spouses cited for these men all chronologically align with men in one or the other of these families, not all the matches could have occurred in either family alone.  We will illustrate the problem by the most glaring set of marriages matches charted by Bartrum, whose charts assume the family shown on the right was the only family.  Bartrum shows 3 spouses for his single Dafydd, the one born c. 1400. 
             a.  Mali ferch Llewelyn Dew ap Madog ap Einion Rwth (descended from Braint Hir), a lady born c. 1375 and correctly assigned to Bartrum's generation 11.
             b.  Angharad ferch Gronwy ap Cynwrig ap Bleddyn Llwyd (descended from Hedd ap Alunog), a lady born c. 1370 but misdated by Bartrum to his generation 12.
             c.  Annes ferch Rhys ap Iorwerth ap Llewelyn Ddu (descended from Llywarch Hwlbrwch), a lady born c. 1415 and assigned to Bartrum's generation 13.
             Did Bartrum really believe a man could have married a woman his own age plus a woman a generation younger plus a woman a generation older than himself?  In fact, it was the c. 1370 Dafydd who married twice to ladies near his own age, and the c. 1400 Dafydd who married the lady born c. 1415.
             There is yet another branch of the Marchweithian family which used the same pattern of male names; it includes a Cynwrig ap Llywarch [13]of c. 1215 and a Cynwrig Fychan [14] ap Cynwrig ap Llywarch of c. 1320.  The wives and children of those men are all assigned to men in Bartrum's charts who lived a full generation too early or too late.  We suggest that family descended from the Llywarch ap Ithel ap Cadwgan ap Ystrwyth shown without children in Bartrum's charts but for whom, in 1334, a gavella in Talybryn, Is Aled [15] was named as its original owner.
           While we found no early sources to confirm it, Marchweithian was contemporary with King Gruffudd ap Llewelyn (ruled 1039-1063) and most likely served some important role in his court.  Neither is it known what brought him to be included among the heads of the 15 Noble Tribes.
[1] See the paper "Pasgen ap Urien 'Rheged', Lord of Gower" under The Royal Family of Gwynedd elsewhere on this site
[2] Pen. 131, 68 and Pen. 127, 152 support the longer version of the pedigree, while Pen. 131, 30; Pen. 128, 257a; and Pen. 176, 75 support the shorter version. The Dwnn citations in vol ii, 228, 332 and 342 all support the shorter version
[3] Survey of Denbigh, p. 124
[4] These sons are Madog, Madog Fychan, Ithel and Iorwerth
[5] The other two sons of Gronwy ap Elidyr were Iorwerth Chwith and Cynwrig
[6] The sons of Cynwrig ap Llywarch still alive in 1334 were Cynwrig Fychan and Heilyn
[7] The 3 sons of Einion ap Cynwrig were Tudor, Einion Llwyd and Cynwrig Moel
[8] The sons of Cynwrig Goch ap Cynwrig were Einion and Madog. 
[9] The sons of Einion ap Llywarch were Cynwrig, Adda and Pyll, all dead by 1334.  Their lands were held by Ieuan and Dafydd ap Cynwrig; Einion and Heilyn ap Adda; and Maredudd, Gronwy and Dafydd ap Pyll.
[10] P.C. Bartrum "Welsh Genealogies AD 300-1400", page 'Marchweithian 4'
[11] Cited in Pen. 134, 265; Pen. 176, 93; Pen. 128, 262a; and Pen. 131, 102
[12] Cited in Pen. 127, 138; Pen. 128, 212a & 646a; and Pen. 176, 79
[13] This Cynwrig ap Llywarch married a daughter of Cynwrig Ddewis Herod, she born c. 1220, which Bartrum assigned to the Cynwrig ap Llywarch born c. 1270
[14] This Cynwrig Fychan married Gwenhwyfar ferch Llewelyn Dew ap Y Penwyn, a lady born c. 1335.  Bartrum assigned the match to a Cynwrig Fychan born c. 1300
[15] Survey of Denbigh, p. 136