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Beli Mawr and Llyr Llediath in Welsh Pedigrees
Papers Related to Maxen Wledig
Bartrum's "Pedigrees of the Welsh Tribal Patriarchs"
Britain's Royal Roman Family
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2nd Powys Royal Dynasty
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Men Descended from Tudwal Gloff
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15 Noble Tribes of Gwynedd
The 5 Plebian Tribes of Wales
Glast and the Glastening
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The Men of Collwyn ap Tangno of Lleyn
Edwin of Tegeingl and his Family
Ednowain Bendew in Welsh pedigrees
Ithel of Bryn in Powys
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Tudor Trefor and his Family
Trahaearn ap Caradog of Arwystli
The Family of Trahaearn ap Caradog
Cadafael Ynfyd of Cydewain
Maredudd ap Owain, King of Deheubarth
Sandde Hardd of Mortyn
The Floruit of Einion ap Seisyllt
The 5 Dafydd Llwyds of Llanwrin Parish
Cowryd ap Cadfan of Dyffryn Clwyd
Osbwrn Wyddel of Cors Gedol
Bradwen of Llys Bradwen in Meirionydd
Who Was Sir Robert Pounderling?
Sir Aaron ap Rhys
Eidio Wyllt - What Was His Birthname?
Ifor Bach, Lord of Senghenydd
Ancestors and Children of the Lord Rhys
                                    SECOND POWYS DYNASTY
                                              CHART II
                                      735  Tegonwy ap Teon[1,2]
                           l                                                   l
               765  Caenog                            765  Iorwerth Hirflawdd
                           l                                                   l
                 795  Corf                                   795  Idnerth
                           l                      ________________l_____
                           l                      l                                     l     830
                 825  Ceido         Cynog Mawr 825               Gwenwyn
                           l                      l                                     l
              855 Lles Llydog         Bleddri  855                    Cadwr  865
                           l                      l                                     l
        885  Gwynnog Farfsych    Bleddyn  885                 Seferys  900
                           l                      l                                     l
             915  Gwaethfoed      Endowain  915                    Ifor  930
                           l                    l                                       l
 965 Nest vz==Gwerystan     Collwyn  945                   Cuhelyn 960
       Cadell [3]       l     950          l                                     l      990
      CHART III       l                 Gwyn 975               Elystan Glodrydd
                           l                 CHART IV                  CHART V
                           l 985                                         l
       wife 1===Cynfyn===wife 2                      daughter  990
                 l    [4,5]    l                                        =
       1018  Efa       Bleddyn[6]  1025            Gwyn ap Collwyn  975
                 =                                                  CHART IV
       Llewelyn Aurdorchog 1005
             CHART I
The Charts cross-referenced above can be seen by clicking on the appropriate links which follow the notes below
[1]  This family descended from the Carnovii tribe of Celts whose lands comprised much of Shropshire and Herefordshire.  An early marriage with a lady of the 1st Powys Dynasty, whose lands were adjacent and north of them, resulted in their combined lands being called Powys.
[2]  By the era of Tegonwy, the Saxons had taken most of the land which now lies east of Offa's Dyke.  The ancestors of Gwerystan held land in Tegeingl granted them in the early 10th century for clearing it of Danish squatters.  Cynog Mawr was Lord of Arwystli, while Gwenwyn was Lord of Buillt and Fferlys....all lands within the original tribal territory.  Fferlys was taken from them by the ruler of neighboring Brychieniog, but that land was recovered by force by Elystan Glodrydd
[3]  Nest ferch Cadell was the only child of Powys king Cadell ap Brochwel ap Aeddon.  Her husband obtained no claim to the kingdom by marrying her
[4]  The first wife of Cynfyn was probably an Irish lady who bore him at least two daughters but died before 1023.  His second wife was Angharad ferch Maredudd ap Owain, king of Deheubarth (southwest Wales); she was the widow of Powys king Llewelyn ap Seisyllt by whom she had a single son, Gruffudd.  By Cynfyn, she had sons Rhiwallon and Bleddyn and probably a daughter. 
[5]  Cynfyn became interim king of Powys in 1023 when Llewelyn ap Seisyllt died because the latter had no sons or nephews yet old enough to become king.  He was considered because he was a maternal grandson of former King Cadell and because he married the mother of Gruffudd ap Llewelyn; Gruffudd was then about 12 years old and was designated as the next rightful king when he attained "full" age.
[6]  When Gruffudd ap Llewelyn was killed in 1063, his sons were about 22 years old and too young to be king.  The eldest son of Cynfyn, Rhiwallon, claimed the kingship of Powys in the right of his father, while Bleddyn ap Cynfyn took the kingship of Gwynedd which Gruffudd had also held.  The remaining Welsh kingdoms had been conquered by Gruffudd, but reverted to their own dynastic families in 1063.  In 1069, the sons of Gruffudd came of full age and did battle for their birthright at Mechain.  They killed Rhiwallon, but both of Gruffudd's sons died leaving Bleddyn in control of both Gwynedd and Powys.  His descendants held Powys until the 1282 conquest of Wales by England's Edward I, and no successful claims were ever made by other branches of the 1st Powys dynasty although several such families were extant
[1] ABT 1b; Mostyn Ms 117: for the ancestry of Bleddyn ap Cynfyn
[2] ABT 13 for the ancestry of Gwyn ap Collwyn
[3] ABT 11 for the ancestry of Elystan Glodrydd