That's very cool.
I would not name it Trophy Wife as it could be misconstrued by others (if you care) that the boat were more important than you...at least it came to my mind anyway. If he feels that way about you, you must be very pretty and mean a lot to him, which is wonderful - but I myself wouldn't want to have the title as one of those crazy 'working women', LOL.
Arianrhod
This is the Celtic god of the Silver Wheel or goddess of Stars and the Sky by which to sail. This wheel was also known as the Oar Wheel. Star goddess; Sky goddess; virgin; goddess of reincarnation; Full Moon goddess. Her palace was called Caer Arianrhod (Aurora Borealis).
You could put the name on it in a Celtic typeset and put the symbol of the wheel of stars, what about something like that?
Branwen
Venus of the Northern Seas. Goddess of love and beauty