To some degree, I think what is going on with the Germanic baby names is that after WWI it was socially unacceptable to giver babies the names of Heathen deities. WWII reinforced this. Few people who are old enough to remember the Second World War are still alive, so those names no longer stir the strong negative associations that they had for most people.

That said, I would never name a child Odin, or even a name that meant "son of" or "devotee of" Odin. That is too heavy a burden for a child to carry.