Is Aeron Cantref
Is Aeron was one of Cardiganshire’s, (Welsh: Sir Aberteifi or Ceredigion) three cantrefs in the Middle Ages.
The cantref was divided into four commotes:
- Is Coed
- Caerwedros
- Gwynionydd (Gwinionydd)
- Mebwynion (Mabwnion)
See medieval boundaries: Cardiganshire | Cantrefs | Commotes | Gwestfâu | Sharelands See 1800 Census Act and later hundreds, parishes and townships: County of Cardigan | Hundred | Parish | Township |