I like the idea of sticking with Norse mythology, just because the 25 seems like a proper update of the Venerable VF-1.
VF-25 Woden
If I'm remembering correctly, Woden was one of the alternate (older) names for Odin. It always sounded more intimidating to me, than plane old Odin. I think Woden was also reffered to as The Hangman, so VF-25 Hangman.
In some takes on Norse mythology, the Vanir are represented as being the newer younger gods, as opposed to the older Aesir. VF-25 Vanir
Or, move into the more monsterous side of Norse mythology, call it the VF-25 Fenris or VF-25 Fenry. VF-25 Fenrirkind could also be used, wich I believe would make the plane an offspring of Fenris/Fenrir. (which ever name you preffer to use for the big ol' wolf)