thumb|"This slap was recorded in the Bardic Triads as one of the Three Fatal Slaps", F. H. Townsend's illustration from [[The Misfortunes of Elphin (1897)]]
thumb|"This slap was recorded in the Bardic Triads as one of the Three Fatal Slaps", F. H. Townsend's illustration from [[The Misfortunes of Elphin (1897)]]
Gwenhwyfach (, , or ; sometimes anglicized to Guinevak) was a sister of Gwenhwyfar (Guinevere) in medieval Welsh Arthurian legend. The tradition surrounding her is preserved in fragmentary form in two Welsh Triads and the Mabinogi tale of Culhwch and Olwen.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).