entity_id,source_id,evidence_type,source_note
ENT_WEL_CREIRWY,SRC_MABINOGION,direct attestation,Named in the Mabinogion (the Four Branches / Culhwch / Hanes Taliesin).
ENT_WEL_CREIRWY,SRC_TRIADS_BROMWICH,scholarly attestation,Attested in the Welsh Triads (Trioedd Ynys Prydein).