* A misspelling: Perhaps it was meant to be a different name with a similar spelling.
* A unique name: Some people create unique names for their children.
* A made-up name: It could be a name invented for a fictional character or other purpose.
Without further context, it's impossible to determine the meaning of "Kieleishah".
If you have more information, like where you encountered this word, it might be easier to figure out its meaning.