Not true. The Norse pantheon has been around since at least 2000 BCE, originating in North Germania and Scandinavia. My ancestors didn't interact with ancient Greece, so the Aesir were not "based" on the Greek myths.
Both Norse and Greek mythology and religions have some connection to a belief system millenia before with the Proto-Indo-European peoples, but the two civilizations didn't have significant contact until the Byzantine Empire, starting in 395 CE. Considering that Ancient Greece fell to the Romans in 146 BCE, and it would be hundreds of years later before the Vikings expanded their exploration and raiding to that area (eventually becoming guards for the Byzantine leaders), the old Norse religion had already been established for centuries at that point.
In any case, Zeus, Mjolnir, or whatever you want to call the MC's D, does fit a theme of being destructive.
So pick what works best for you