> "Crooked mouth" is one of many possiblilities that has been thrown out
> there for consideration, but never proven. The other is "Campo
> Bello", Latin meaning "pretty plain".
In that case it must be proven that using Latin place descriptions as surnames was a productive type of forming
> from the village of "Belchamps" in Southern England. Belchamps has
> the same meaning as "pretty plain", but with the words in French with
> reverse order. We are also finding people by the name of "Shamblin"
> with "Campbel-type" DNA, which again is suggestive of "Champ bel",
> again borrowing from the French.
At the time of the Norman invasion, the "ch" of OFr. "champ" would have been pronounced as /š/ or probably still /tš/.
This would not have been substituted by /k/ in Gaelic, but rather by palatalised /s'/.