cantref
Noun
Meaning
A district comprising a hundred villages, as in Wales.
Source: Webster's dictionaryExamples
Turvey p. 44. Henry appears to have been uncertain what to do with Rhys, but after a few weeks decided to free him and allow him to rule Cantref Mawr.
Gwen Evans, owner of Cantref Adventure Farm in Brecon, said the news had come 'very suddenly'.
Warren p. 163. Rhys had other reasons for rebellion, for he had returned to Deheubarth from England to find that the neighbouring Norman lords were threatening Cantref Mawr.