User blog comment:Epakrios/Plot holes/@comment-98.198.247.12-20140128103757/@comment-1509826-20140129230641

Although Mesopotamia ended back then. The region was still known as Mesopotania in some parts well into the early 18th Century.

Alternatively, as Naomi is thousands of years old, and doesn't often visit earth. Its possible she's unaware its changed name.