More can be proven to derive from Gaulish, which arrived through Norman French, often strengthened in form and use by Church/state Latin.
This list omits words of Celtic origin coming from later forms of Brittonic and intermediate tongues: Academia recognises beyond all reasonable doubt "fewer than ten" Brittonic loan-words in English that are neither historic nor obsolete.
[2] The following list derives mainly from surveys of possible Brittonic loanwords in English by Richard Coates, Dieter Kastovsky, and D. Gary Miller.
Etymologies from the Oxford English Dictionary are included to indicate the view of this authoritative (but not necessarily definitive) source, distinguishing between the first, second, third and online editions.
Words that are the most widely accepted as Brittonic loans are in bold.