Aergol Longhand (Modern Welsh: Aergol Lawhir; c. 437 – c. 515) was a legendary king of Dyfed and son and heir of King Triffyn Farfog.
[1] He was a patron of the church at Llandaff and the bishops of Glywysing Saints Teilo and Euddogwy.
Aergol was known to be an enemy of King Cynan Garwyn of Powys and they clashed at Crug Dyfed.
He possibly conquered the Ystrad Tywi around the late 400s which was why he was given the name “Long-Hand.”
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