Tredegar Fort

The poet Gwilym Tew.. presided at a Gorsedd in Glamorgan in 1460, about which time he wrote a complimentary poem in praise of Sir John Morgan of Tredegar, Knight of the Holy Sepulchre, whom in the title he styles Syr Sion ap Morgan o Dre-Degyr, and again in the poem itself he writes the name Tre-Degyr [..] the capital D indicating a proper name. In a MS. of the seventeenth century, in the possession of Mr S.R. Bosanquet, is this statement, "The house of Tref-ddigr, holden by inheritance of blood from time to time, is the most ancient in all Wales." "Teigr ap Tegonwy was an ancient prince in King Arthur's time" [..] though Teigr may be as mythical a personage as King Arthur, this is strong presumptive evidence that there was such a traditionary personage connected with this place...
Octavius Morgan, The Friars, Newport, Mon.
Notes and Queries, Volume s6-IV, Number 96, 1881