Don't worry about the boating gods...
Freighters and other commercial ships get their name changed every time they change hands... you don't see them sinking all over the place, do ya? (..and even when they do, it's usually got more to do with the owner pushing to keep an "old boat" working far beyond it's useful lifespan).
My recipe for re-christening a boat has always been to invite some freinds, buy a good bottle of Champagne, open it and pour some down the bow and serve the rest to your waiting guests. (...smashing a bottle across the bows is such a waste!)
Besides if there really were "boating gods", gas would be $1 a gallon! ...Not to mention, it'd never rain all summer! ...In fact, if they really existed, it wouldn't be so damn cold right now!!