What is the correct spelling in Gaelic for Campbell?

There isn't one single correct spelling of Campbell in Gaelic, as it depends on the specific dialect. The most common spellings are:

* Caimbeul: This is a very common and widely accepted spelling.

* Camshron: While less frequent than Caimbeul, this is also used. Note the difference; this is not the same as the separate Cameron clan.

Therefore, you'll often see either `Caimbeul` or `Camshron`, depending on the context and the individual's preference.