NIGHTBRINGER | The Arthurian Encyclopedia

Sulyen

Sulien

A warrior in Arthur’s service, related to Arthur through Uther.

He was the son of Iaen and the brother of TeregudBradwenMorenSiawn, and Caradawg.

Sulyen was the name of an eleventh-century abbot of Llanbadarn whom appears several times in different documents.


Source
Culhwch and Olwen | Late 11th century