Formal:
* Catherine: This is the most common and formal translation. It's a classic French name with a similar feel to Kathryn.
* Katherine: This is another common and formal option, and it's a more direct translation of the name.
Informal:
* Cathy: This is a common nickname for Kathryn, and it translates directly to "Cathy" in French.
Other options:
* Katerine: This is a more modern and less common option, but it's still a valid translation of the name.
It's important to consider the context when choosing a French translation for "Kathryn". If you're looking for a formal name, Catherine or Katherine would be the best choices. If you're looking for a more informal option, Cathy would be a good choice.