Nuada's name has a well attested cognate across the Irish Sea that gives his myth an unexpected archaeological counterpart. The Romano-British god Nodens, worshipped at a temple complex at Lydney Park in Gloucestershire, is linguistically the same name as Nuada and the Welsh Nudd, descending from a shared Celtic root, and the site was excavated in the 1920s by Mortimer Wheeler, whose report remains a foundational study of Romano-Celtic temple archaeology. The temple was a healing sanctuary, richly appointed with a long guest house or abaton where pilgrims likely slept hoping for a curative dream, and the excavation recovered votive offerings including small bronze and stone models of dogs, animals long connected with healing cults, and, strikingly, a number of votive limbs of the kind routinely dedicated at ancient healing shrines by worshippers seeking or giving thanks for a cure. Wheeler and later commentators have found the coincidence hard to resist: a god sharing Nuada's name, presiding over a shrine where models of limbs were left as offerings, though no inscription at Lydney explicitly connects the shrine to the Irish tale of the silver arm, and the link rests on the shared name and the suggestive finds rather than any text stating the connection outright.
Nodens also appears on a famous inscribed lead curse tablet from the site, in which a worshipper named Silvianus asks the god to afflict a man who stole his ring, evidence of ordinary petitionary religion alongside the shrine's healing function. Whether Nuada and Nodens preserve one ancient god worshipped on both sides of the Irish Sea, or two related figures sharing a name, remains a genuinely open question in Celtic studies, since the Irish and British evidence never quite touch.