How do you spell the name jessica in french?

I believe that it is Jessica.

You might want to check out the following link:

French names - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/French_name)

Do a "Find On this Page" and look for Jessica.

Jessica would be correct.

It's Jessica!

Why would it be different?

A name is a name... for names there is no such thing as translating it :) :) :)