Re-naming a Yacht

[First Impression]

Hi All,
i've recently bought a Robert Tucker Unicorn 24' which was a pretty much last chance project boat. she's been sat in Conwy for years, and was close to being a scrapper.
It turns out that she is called Pintail III, but i dont really like the name.
Now i want to rename her (Possibly Phoenix).
Now i'm not usually superstitions,but since i joked about naming a previous boat 'titanic' just before the trailer broke away from my van whilst going down a road, then watching her roll over several times until she sank in a drainage ditch.
(this was her maiden voyage in my ownership)
So is there a 'proper' way of renaming a boat?
Kev

If you don't like the name, why not use a foreign translation? Google says that 'Pin Tail' in Latin is: 'Paxillus Constituet' or 'Paxillus Cauda'. If your boat was called 'The Saucy Sue', you could stick on the stern: 'In Procax Sue'. Wouldn't solve the CG problem though...