The Welsh Triads arrange memorable people, deeds and qualities into groups of three. Dyfyr's best-known appearance is in the grouping commonly translated as the Three Splendid Maidens of Arthur's court. This recognises her alongside Enid and Tegau Gold-Breast without narrating an adventure shared by the three women. The title of the group may be rendered differently in English, and the texts survive through manuscripts copied at different times. The existence of several versions should not be turned into one supposedly verbatim speech or an exact date for Dyfyr's life.

Her name also varies in spelling. Dyfyr Wallt Euraid supplies the Welsh form behind Golden-Hair, while Dyvir reflects another representation of the name. The golden-haired epithet is the most direct descriptive information preserved about her. It can be recognised without imagining a particular dress, landscape or supernatural ability. Proposed connections between the personal name and words associated with water are interpretations, not sufficient evidence for a river spirit or goddess. The literary woman and an inferred divine predecessor should not be treated as the same securely attested identity.

A fuller version of the maiden grouping, preserved in the prose speech known as Araith Ieuan Brydydd Hir, identifies Dyfyr as Glewlwyd Gafaelfawr's sweetheart. This matters because it gives a textual basis for the relationship rather than making it a modern guess. Glewlwyd appears elsewhere as a gatekeeper of King Arthur's court, including in Culhwch and Olwen. His own adventures and duties belong to those other accounts. Their association does not tell us how the pair met, where they lived or whether Dyfyr took part in the encounters at the gate.

The different amounts of surviving material about her companions help explain Dyfyr's appeal. Enid has a developed narrative in Geraint and Enid; Tegau is remembered in traditions concerning fidelity. Dyfyr's shorter notices leave far more unstated. A catalogue can preserve a name after other material has disappeared, but that possibility does not prove that a complete romance once existed or allow its plot to be recovered from an epithet. Her importance lies in the evidence that does remain: a named woman with recognised standing at Arthur's court and a particular relationship within its household.

Dyfyr Golden-Hair should also remain distinct from Dyfyr son of Alun Dyfed, a male figure in other Welsh Arthurian references. Shared or similar names do not establish one character. Keeping those identities apart preserves what is distinctive about the maiden tradition. Dyfyr can be appreciated without an invented transformation story or an unverified catalogue of modern appearances. She represents the quieter parts of Arthurian literature, where a name and a few carefully preserved connections survive even when a full biography does not.