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          Bartrum offers 3 pedigrees for this man and his "brothers", Rhun ap Dyfnwal and Blegywryd ap Dinawal:
(1)  Cydivor ap Dinawal ap Eunydd ap Aelaw ap Alsser ap Tudwal ap Rhodri Mawr
(2)  Rhun ap Dinawal ap Dyfric ap Rhun ap Alun Dyfed
(3)  Cydifor and Rhun and Blegywyrd ap Dinawal ap Gwyn ap Gwelw gwinffrwyd ap Dafydd du taris of Mon ap Dafydd ap Owain Gwynedd. [1]
        In his notes, Bartrum dates the birth of Cadifor to c. 1130 and thinks Blegywryd was his brother.  However, he dates the birth of Rhun to c. 1170 and says he was probably not a brother of Cadifor and Blegywryd.  He appears to reject pedigree (2) outright since he says Alun Dyfed was a traditional hero of the sixth century.  Pedigree (3) was wholly rejected by Bartrum as "obviously chronologically impossible".
         When speaking of the Cadifor who scaled the walls of Cardigan Castle  in 1165, this version is the only one of the three that contains credible elements.  It errs by omitting Tudwal as the father of Dyfnwal, and also omits a second pair of "Aelan ap Alser" before reaching Tudwal Gloff.
         We identify a Rhun (1130) ap Dyfnwal as the older brother of Cadifor and reject this version as complete nonsense which seeks to tie Rhun to mythical heroes of the dark-ages era.
         This pedigree speaks of a wholly different family which also contained men called Cadifor, Blegoryd and Rhun ap Dyfnwal, but who lived at much earlier dates than those descended from Tudwal Gloff.  We have examined this pedigree in detail in our paper at the link below:

                                       865  Tudwal Gloff
                                         895  Alser
                                         930  Aelan
                                         965  Alser
                                         995  Aelan
                                      1030  Eunydd
                              l                                                   l
                1065  Tudwal                                1060  Dyfnwal
                              l                           _____________l_______
               1100  Dyfnwal                      l                                   l
             _________l_______   1090  Bran               1090  Blegoryd
             l                             l              l
1135  Cadifor           1130  Rhun     Llowarch  1120
[1] We suggest the first "ap Dafydd" in this pedigree is misplaced and belongs immediately preceding the second "ap Dafydd".  Next we would delete the "ap" following Gwyn since "gwelw" is not a male name, but means "pale".  This allows Gwyn to be described as "with a pale white stream flowing over the black earth of Mon"