Breton genealogies

The Vita secunda S. Winnoci (c. 1064), which gives the pedigree of the kings of Domnonia, and is composed of two segments a and b, states:

“Riwalus Britanniae dux filius fuit Derochi filii Guitoli filii Urbieni filii Catoui filii Gerentonis. Hic Riwallus, ad transmarinis veniens Britannicis cum multitudine nauium, possedit totam minorem Britanniam tempore Clotarii regis, qui Clodovei filius existitit.”

This suggests Riwal, who appears in segment b, belonged to gen. 0. I believe he was the father of Tristan.That Riwal was of gen. 0 is confirmed by Cartulaire de Landévennec, Cartulaire de Quimper and Cartulaire de Quimperlé. Those documents mention various dukes of Brittany. Conanus Sunnoc was Conan III. Alanus Hir Anger was Alan Fergant, i.e. Alan IV. Houel Huuel was Hoel II. Alain Canhiart died 1058.

Riwal’s sister, Pompaea who was the mother of Tudwal, is likely to be Alma Pompa, the mother of Leonorius. The former son was was a contemporary of Deroch II and the latter of Childebert. Breton tradtion states that Pompaea was married to Hoel Meur. This is chronologically possible according to Chronicon Briocense.

Triens of Judicahel struck at Rennes 632 - 638

Triens of Judicahel struck at Rennes 632 – 638

Now turning to segment a of the V. Winocci, the Chronicle of Fredegar indicates Judicahel was a contemporary of Dagobert, and so belonged to gen. 3. That Judicahel was of gen. 3 is confirmed by Cartulaire de Redon as his descendant, Roiantdreh, took prince Salomon, who was duke of Brittany from 857 to 874, as her adopted son when her son died in 861.

Jonas, who is listed in segment a, appears in Culhwch ac Olwen as Iona, king of France, a companion of Arthur. His father, Riatham, is Riothamus who Jordanes called the king of the Britains and who was militarily active around 470.

Aurilla, who appears in the V. Melori Martyris, is said to have been the daughter of Iudoc who belonged to gen. 3. This would suggest Melor was of gen. 5. However, it is more likely that Aurilla was the daughter of Rydoch ap Brychan as indicated by JC 2 11. DSB 11 11 adds the comment “in Francia” and a gloss refers to him as Iudoc. Brychan is of gen. -3 since his daughter, Meleri, was married to Ceredig ap Cunedda Wledig.


Gen. CB a CB d CB e CdL CdQ
19 Conanus Sunnoc
18 Alanus Hir Anger
17 Houel Huuel Houel
16 Alan Canhiarh Alanus Chaniart
15 Binidic Budic
14 Budic Bud Berhuc Budic Castellin
13 Diles Heirguor Chebre Diles Hergu Kembre
12 Aulfret Alesrudon Aufret Alefrondon
11 Gradlon Plueneuor Gralen Ploeneor
10 Fragual Fradleoc Ffraval Fradleuc
9 Budic Mur Budic Mur
8 Concar Cheroenoc Congar Keroenuc
7 Gradlon Flam Gradlem Flam
6 Daniel Unua Daniel Unna
5 Alanus Magnus Iahan Reith Jahan Reeth
4 Salomon II Budic et Maxenri Budic et Maxenti
3 Hoelus Tertius Daniel Drem Rud Daniel Drem Rud
2 Alanus Gradlon Mur Gradlen Mur
1 Hoelus Secundus Judualus Tremorus Concar Congar
0 Hoelus Magnus Jonas Conomerus Tryphina Riuelen Marthou Ri Welen Mar Chou
-1 Budicus Riatan Werochus I (Riuelen Mor Marthou) (Ri Welen Mur Mar Chou)
-2 Audroenus Derochus
-3 Salomon Rivalus Murmaczon
-4 Grallonus Magnus
-5 Conanus Meriadocus
Gen. CdQl d CdR CF JC 2 11 V. Melori Martyris
20 Berta
19 Conanus
18 Alan
17 Hoel
16 Alan Cainard
15 Binidic
14 Budic Castellin
13 Diles Heergur Kembre
12 Altfret Alefrudon
11 Gradlon Plueneur Roiantdree
10 Fraugual Fradleuc Louenan
9 Budic Mur Juduual
8 Cungar Keroenuc Argant
7 Gradlun Flam Custentin
6 Daniel Unua Judon
5 Jahann Reeth Urbon
4 Budic et Maxenri Urbien
3 Daniel Drem Rud Jedechaël
2 Gradlun Mur Tewdwr Waroch II Iacob
1 Cungar Budic Macliau Canao
0 Rimelen Marthou Melorus
-1 (Rimelen Mur Marthou) Rivodius Meliavus Aurilla
-2 Reidoc Budic
-3 Brachan Daniel
-4 Lex or Regula
Gen. V. Winnoci a V. Winnoci b
3 Winnoch Judoc Judicahel
2 Juthael
1 Judwal Deroch II
0 Jonas Riwal
-1 Riatham Deroch I
-2 Withol
-3 Urbien
-4 Cathou
-5 Gerenton


St. Samson was a generation younger than Illtud and was ordained by him at the abbey of Llanwit Major (Llanilltud Fawr).

Plate: Nash-Williams, V. E., 1950, The Early Christian Monuments of Wales

There is an inscribed stone at the church there which states it was prepared for the souls of Samson the abbot and others, one of which is a king called Iuthahelo, that is Ithel (Barturm incorrectly thought the stone bore the name Iltutus). 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 Illtud 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 alive during the reign of Brychan of gen. -1, is likely to have been the Germanus who ordained Illtud. He was St. Garmon who, as indicated by Bartrum, was the Germanus of the Historia Brittonum. HB 39 suggests he was probably of the same generation as Vortigern’s daughter, that is gen -2.

[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
3 St. Collen St. Collen
2 St. Collen Gwennog Ethni Wyddeles Gwennog Ethni Wyddeles
1 Pedrwn Coleddog St. Melangell Coleddog Matholwch
0 Coleddog Cawrdaf [Rhicwlff] Ethni (Wyddeles) Cawrdaf
-1 Gwyn Caradog Freichfras Tudwal Tudclyd Caradog Freichfras Margred
-2 Llŷr Marini Cedig Llŷr Marini Earl of Rhydychen
-3 Einion Yrth Dyfnwal Hen
-4 Cunedda Wledig 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 three 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.