The paradox makes sense to me.
Even though the name
Tiffany would be realistic on a woman from the 15th century, people today would just picture a 20-something woman from today and call it anachronistic.
So best to name that character
Kriemhild or something that “sounds” medieval, if you want to not break the immersion, even if it’s dowdy or even less accurate.
Life—the greatest adventure for which one could ever ask. 人生は最高な冒険ですね!