is she Syrian?

I agree. She doesn't look what would be considered the French look by some standards.

And being that southern France is similar to Italy, it would make sense that some of its citizens would have Middle Eastern heritage from the early Byzantine times.

And yes. I am Middle Eastern, and I have blonde hair and brown eyes. My cousin actually has blonde hair and light green eyes, and my Iranian grandfather had blue eyes. People seem to assume that the Middle East all share the same facial structure/eye color/etc.

I'd go blonde for Kathryn Prescott