* Quell is an English word meaning to suppress or put an end to something, usually something unpleasant or harmful.
* Bon is a French word meaning "good."
Therefore, "quell bon" doesn't have a clear meaning in English. It might be a misspelling or a phrase from another language that has been incorrectly translated.
If you can provide more context or the source of the phrase, I may be able to help you understand its intended meaning.