That depends on your religion.
If you're a Greek (not a Greek national, but an old time worshipper of the Greek Gods) or you follow other older ways, probably.If you're a Christian, Jew, or Moslem, no no no, boat naming is a pagan way and heresy.There are some modern day folks who swear there is one correct ceremony--and they're full of bunk. Nautical tradition going back at least to the Greeks and probably the Phoenicians before them, is that a captain is literally WED to his ship, which is considered to be a daughter of Poseidon (etc). A priest conducts the wedding and acts for a blessing of the new couple. The purpose of the wedding, and the dowry coin placed under the mast on commissioning, is to invoke Poseidon's favor for the new husband of his daughter, the boat.Change the name and the sea god may not know who the stranger is, or worse he may be angered.So...You make your own placations and peace with your new wife, and her father. You ask their permission and their blessing, and while you're at it, you might speak to the Wind and weather gods as well.Or if you follow one of those newfangled Western religions, just make your prayers before you go to sea. Monotheists usually don't bother with wedding boats, and commit heresy by addressing pagan gods.Your boat, your choice.