List of English words of Welsh origin

As with the Goidelic languages, the Brythonic tongues are close enough for possible derivations from Cumbric, Cornish or Breton in some cases.

Beyond the acquisition of common nouns, there are numerous English toponyms, surnames, personal names or nicknames derived from Welsh (see Celtic toponymy, Celtic onomastics).

[1] Similar cognates across Goidelic (gaelic), Latin, Old French and the other Brittonic families makes isolating a precise origin hard.

This applies to cross from Latin crux, Old Irish cros overtaking Old English rood ; appearing in Welsh and Cornish as Croes, Krows.

It complicates Old Welsh attributions for, in popular and technical topography, Tor (OW tŵr) and crag (Old Welsh carreg or craig) with competing Celtic derivations, direct and indirect, for the Old English antecedents.