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.

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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.