St. Samson was a generation younger than Illtud and was ordained by him at the abbey of Llanwit Major. There is an inscribed stone at the church there which states it was prepared for the souls of himself and others, one of which is a king called Iuthahelo, that is Ithel. This is likely to be Ithel Hael of Llydaw, thus indicating Llydaw was not only the name for Brittany but also of a region of Glamorgan. Illtud’s father was Bicanus, prince of Llydaw. He may have preceded Erb, king of Gwent and Ergyng, and been conflated with Erbic, a later king. This would suggest Bicanus was of gen. -2 and Illtud of gen. -1. His mother was Rieingulid, daughter of Anblawd, wrongly identified as Amlawdd Wledig.

V. Samsonis states that he was a disciple of St. Germanus but chronology indicates this could not have been the bishop of Auxerre. The V. Ninnochae states:

“Sanctus Germanus episcopus ex Hibernensium regione transmissus a Sancto Patricio archiepiscopo, venit ad Brochanum regem Britanniæ.”[1]

This individual, who was contemporary with the Brychan of gen. -1, is likely to have been the Germanus who ordained Illtud.

[1] Baring-Gould, S., Fisher, J., 1911, 68.

St. Collen

ByS offers two versions of Collen’s pedigree as shown in columns 2 and 3:

Gen. ByS 52 ByS G 34 ByS G 35 B. Collen
4 St. Collen St. Collen
3 Gwennog Ethni Wyddeles Gwennog Ethni Wyddeles
2 St. Collen Coleddog Coleddog Matholwch
1 Pedrwn Cawrdaf St. Melangell Cawrdaf
0 Coleddog Caradog Freichfras [Rhicwlff] Ethni (Wyddeles) Caradog Freichfras
-1 Gwyn Llŷr Marini Tudwal Tudclyd Llŷr Marini Margred
-2 Einion Yrth Cedig Earl of Rhydychen
-3 Cunedda Wledig Dyfnwal Hen
-4 Ednyfed
-5 Macsen Wledig
-6 Llywelyn

Bartrum stated that the earlier one, shown in column 2, was probably more accurate. He reasoned that Ethni Wyddeles, the mother of Collen according to the later version, is in reality the mother of St. Melangell as indicated by ByS G 35 and ByS 53 (not shown above). Note, although Rhicwlff, the father of Melangell, was lost in ByS G 35 he is shown in ByS 53.

In fact, the later pedigree is the correct one and the B. Collen agrees with that version. The mistake that Bartrum made was to accept that the two instances of the name Ethni referred to the same person as was wrongly suggested only by the ByS G version . Evidence that they were not is provided by the Latin life. In it Melangell is said to be contemporary with Brochwel Ysgithrog, king of Powys. Bartum stated this was impossible but column 6 shows she was of gen. 1 and so the story, which explains why she became the patroness of hares, is chronologically correct.

The earlier version has confused Coleddog ap Cawdraf with Coleddog ap Gwyn who, according to triad 74, was an anheol, i.e. one who could not be expelled, of Arthur’s Court. This suggests  he may have been an earlier Coleddog than the individual in Collen’s ancestry and we may speculate that ByS 52 is referring to St. Colan of Cornwall.

The B. Collen relates a story of Collen as abbot of Glastonbury interacting with Gwyn ap Nudd. These two individuals were seperated in time by four generations which explains why the story is legendary in nature. It may be a symbolic reference to Collen removing vestiges of pagan belief from the Glastonbury area.

Maeswig Gloff and Mar ap Ceneu

Bartrum argued that Maeswig and Mar were names for the same individual. However, to understand why this was not the case we need to begin with Onnengreg f. Gwallog m. Lleenog who ByS 48 tells us was the wife of Meurig ab Idno:

Gen. ByS 48 ByA 13 ByS 12
3 Elaeth Frenin
2 Meurig Onnengreg Meurig Mabon Deiniol
1 Idno Gwallog Idno Dunod Fwr Dwywai
0 Lleenog Meirchion Pabo Post Prydyn Lleenog

ByA 13 provides additional information that Meurig had a brother named Mabon and that Idno was the son of Meirchion. We may, therefore, conclude Meirchion and Lleenog were of the same generation. The question is which generation. Bartrum adopts the view that the father of Idno was Meirchion Gul, an assertion that appears in the ByS G 54 of c. 1510, see diagram below.

Descendants of Ceneu

However, this descent, which implies Idno’s father belonged to gen. -1, is not shown in any other source. ByS 12, see the table above, shows Lleenog belonged to the same generation as Pabo Post Prydyn who is known to have belonged to gen. 0, see Pabo and Sawyl, allowing us to conclude Meirchion and Lleenog were also of that generation. We may now maintain that Maeswig Gloff, the  father of Lleenog, was the son of Mar ap Ceneu as shown in the table below.

Gen. HG 9 JC 36 ByA 28c
2 (Beli)
1 Gwallog Gwallog Rhun Perweur
0 Lleenog Lleenog Rhun Ryfeddfawr
-1 Maeswig Gloff [Maeswig Gloff] Einion
-2 [Mar] Mar Mar
-3 Ceneu [Ceneu] Ceneu
-4 Coel Hen Coel Hen Coel Hen

ByA 28c demonstrates that Mar belonged to gen. -2 and so we can discount the possibility tha Maeswig was the father of Mar. Curiously,  Bartrum’s assertion, whether right or wrong, that Ceredig ap Gwallog died in 620 is more in line with my analysis rather than his own.

Peredur and Gwrgi

According to BGG 5 the twins Peredur and Gwrgi were 5 generations later than Coel Hen which would suggest they belonged to gen. 1. However, DSB 12(14) tells us they belonged to gen. 2, see the table below.

Gen. DSB 12(14)  
2 Peredur Gwrgi Estedich
1 Eliffer Gosgorddfawr Efrddyl Urien Rheged
0 Nyfain Cynfarch Cul
-1 Brychan Meirchion Gul

This contradiction can be resolved using HG 12 which states the father of Eliffer Gosgorddfawr was someone known as Letlwm, possibly a corruption of the individual’s actual name, see the table below. He was not Gwrwst Ledlwm who was another son of Ceneu ap Coel. Using BGG 5 and HG 12 the descent of the twins Gwrgi and Peredur from Coel Hen can be reconstructed.

Gen. BGG 5 HG 12
2 Gwrgi Peredur Gwrgi Peredur
1 Eliffer Gosgorddfawr Eliffer Gosgorddfawr
0 [Letlwm] Letlwm
-1 Arthwys [Arthwys]
-2 Mar [Mar]
-3 Ceneu Ceneu
-4 Coel Hen Coel Hen

Custennin Gorneu and Custennin Fendigaid

Bartum argued the two names Custennin Gorneu and Custennin Fendigaid, that of the brother of Aldwr, refer to the same individual citing ByS 76 as one piece of evidence:

“Thus Custennin Gorneu and Custennin, the grandfather of Arthur, have been tacitly identified. Further confirmation of this is the fact that Erbin ap Custennin is said to have been uncle to Arthur, and Geraint ab Erbin first cousin to Arthur in the tale of ‘Geraint and Enid’ …”[1]

However, that passage has been influenced by HRB which attempts to claim a Breton ancestry for Arthur. The following table shows that Custennin Gorneu was of gen. -3 whereas Custennin Fendigaid, being the brother of Aldwr, was one generation later:

Gen. ByS 26 ChB ByS G 24a
6 Conobertus
5 Alanus Magnus
4 Salomon II
3 Hoelus Tertius
2 Alanus Cristiolus Rystvd
1 Hoelus Secundus Howel vychan
0 Kyby Hoelus Magnus Howel
-1 Selyf Gereint Budicus Emyr Llydaw
-2 Erbin Audroenus
-3 Custennyn Gorneu Salomon
-4 Grallonus Magnus
-5 Conanus Meriadocus

The names in the above table are as they appear in the document. Note, ByS 26 has been adjusted to show Cybi as being the son of Selyf ab Erbin as indicated by his Vitae. Budic was referred to as Emyr Llydaw. This can be confirmed by looking at parallel entries in the HRB and the ByB. However, chronology indicates that the Breton king with whom Uthr and Ambrosius found refuge was Budic ap Cybrdan.

[1] Bartrum, P. C., 2009, 178.

The two Deiniols

There were two Deiniols who have become conflated and their pedigrees are shown in the table below:

Gen. ByS 12 ByS 13
2 Deiniol
1 Dunod Fwr Dwywai
0 Pabo Post Prydyn Lleenog Asaph Deiniolfab
-1 Sawyl (Benuchel) [Benisel] Gwenasedd
-2 Pabo (Post Prydyn) Rhain Hael

As indicated by the AC, Dunod Fwr died in 595. According to the HRB he was at Arthur’s coronation. He was also present at the battle of Arderydd. It was his son who predeceased him in the year 584 as indicated by the AC. His death is mentioned together with the battle of the Isle of Man and, perhaps, the two are related.

Note, St. Asaph’s sister was one of the wives of Maelgwn Gwynedd and the mother of Eurgain. Maelgwn’s Wife and the Ring describes an incident involving her as well as St. Asaph. The Daniel referred to as having died in the reign of Constantine in the HRB was Deiniolfab, the brother of St. Asaph.

ByS 13 gives Sawyl the incorrect cognomen Benuchel. It should have been Benisel. As indicated on the chart, the Pabo of ByS 13 did not have the cognomen Post Prydyn, see Pabo and Sawyl.


The pedigrees in the first table relate to Tewdrig, son of Llywarch, king of Gwent who is mistakenly given a father named Teithfall in two of the documents, a conflation with the Tewdrig of the second table below. The BLD tells of his martyrdom. It was foretold that following his victory over the Saxons there would be peace for 30 years. The renewed conflict is referred to in the ASC under the year 577. The BLD also mentions Teilo receiving gifts from him.

Gen. ABT 15a HG 28 HG 29 JC 9 seg.
JC 10a MP 3 seg.
19 Morgan
18 Caradog Caradog
17 Iestyn Iestyn
16 Gwrgan Gwrgan
15 Ithel Ithel
14 Idwallon Idwallon
13 Morgan Mawr Morgan Hen Morgan Hen Morgan (Mwyn)fawr [Hen]
12 Owain Owain Owain Owain
11 Hywel Brochwel Hywel Hywel Hywel Brochwel
10 Rhys Ithel Meurig Rhys Rhys Rhys Meurig
9 Arthfael Athrwys Arthfael Arthfael Arthfael Arthfael Arthfael
8 [Gwriad] Ffernfael [Gwriad] Gwriad [Ceingar] Gwriad [Gwriad]
7 [Brochwel] Ithel [Brochwel] Brochwel Cenedlon Brochwel [Brochwel]
6 Rhys [Rhys] Rhys Rhys Briafael Frydig Rhys
5 (Ithel) [Einudd] [Einudd] (Ithel) [Einudd] Nudd Hael Llywarch Einudd
4 Morgan Morgan Morgan Morgan Tewdwr Morgan
3 Athrwys Athrwys Athrwys Peibio Glafrog Athrwys
2 Meurig [Meurig] Meurig Arbeth Meurig
1 Tewdrig Tewdrig Tewdrig Dyfrig St. Tewdrig
0 (Teithfall) [Llywarch] Llywarch [Efrddyl] (Teithfall) [Llywarch]
-1 Nynnio Nynnio Peibio Nynnio
-2 Erb Erb Erb
-3 Erbic Erbic Erbic
-4 Meurig Meurig
-5 Enynny Enynny

The pedigrees in the second table are relevant to the earlier Tewdrig ap Teithfall, king of Garthmadrun.

Gen. JC 1a
JC 1b
V. Cadoci 46a
V. Cadoci 46c
1 Cadog Cadog
0 Cynog Gwladus Gwladus
-1 Brychan Brychan Brychan [Brychan]
-2 [Anlach] Marchell Anlach Marchell
-3 Coronac Tewdrig [Coronac] Tewdrig
-4 Eurbre Wyddel Teithfall Eurbre Wyddel  Teithfall
-5 Teithrin Brusc
-6 Briscethach