Outigern

HB 62 starts thus:

[T]unc Dutigirn in illo tempore fortiter dimicabat contra gentem Anglorum.

Then Outigern at that time bravely fought against the English nation.

Morris J., 1980. Adapted by alex Woolf.
Dutigirn detail © British Library Board Harley MS 3859 f.188v.

Since the name Dutigirn is unknown, it was considered a corruption of Outigern. It is generally thought that the modern form of the name is Eudeyrn. This passage immediately follows a reference to Ida son of Eoppa (ob. c. 559) in HB 61. Moreover, the following text in HB 62 refers to Talhaearn, Aneirin, Taliesin, Blwchbardd and Cian, as well as Maelgwn Gwynedd (ob. 547).The Welsh kings mentioned in HB 63 are Urien, Rhydderch Hen, Gwallawg and Morcant. All this information points to Outigern being of gen. 1.

The problem is that although a ruler named Outigirn appears in gen. -14 of HG 10, neither that name nor Eudeyrn appears in gen. 1. However, it is to be noted that the name Outigirn appears as Keyeirn in MG 1 and Kyndeern in JC 5. The latter name, Cyndeyrn, which appears in the Brut y Brenhinedd takes the form Katigern in the De gestis Britonum. We may, therefore, speculate that Dutigirn was actually a corruption of Catigirn, which itself derived from Cyndeyrn.

Gen.ByS 14 ByS 6b
-3  Kuneda wledic
-2  Keredic
-1  Garthawc
0  Kyngar
1Vryen(llu) Lewdwn luydawcKyndeyrn
2EweinDenw 
3Kyndeyrn garthwys  
Bartrum, P.C, 1966, 56.

Cyndeyrn Garthwys, that is St. Kentigern, must be excluded from consideration as he appears two generations later. It follows a likely candidate for Outigern is Cyndeyrn ap Cyngar.