Hi, Cupcake. You did not provide the name of your state. This is a question asked of all posters, because laws vary significantly from state to state. You also did not start your own thread, which is generally requested of posters who have a new question, even if it relates to the subject of an old post.
But, since no one else seems to be following those rules very well in this particular thread
, I might as well answer your question here.
It can violate the rights of the celebrities to use their names to identify your ice cream flavors if you do not obtain permission from these celebrities first. There are publicity right laws and privacy right laws and even trademark laws that protect the names and likenesses, and even the voices and signatures, of individuals.
The right of publicity is the right of a person to control any commercial use of his/her identity and persona. Famous people need to prevent the unlicensed use of their names and likenesses, because their names and likenesses are commercially valuable. In 2008, California expanded their right of publicity law and granted retroactive rights of publicity to dead celebrities, as their names and images can be valuable to their heirs.
New York, on the other hand, has rejected a right to publicity law, for dead or alive celebrities, although New York has a Civil Rights Law that has a section that is similar, in that it protects against the use of a name or likeness for a commercial purpose without written consent.
The right of publicity does not only apply to alive and dead celebrities. This right applies to ordinary folks, as well. Permission must be obtained to use anyone's name or image in a commercial manner. I cannot use your image to sell my coffee.
Privacy laws (which generally cover four separate torts - false light, private facts, intrusion, misappropriation of a name or likeness) make it a crime to misappropriate the name or likeness of an individual for a commercial purpose. State publicity right laws are often bundled with these state privacy laws.
And trademark law can protect the trademarked name and image of a person (or cartoon character or animal) from infringement by others. A celebrity or famous person name or image is often trademarked when the celebrity or famous person has developed and is promoting a product line (ie. Elizabeth Taylor's perfume, Justin Timberlake's clothing line).
Famous names have been used to identify food products for a long time. As early as the 16th century, a pastry was named after a well-known Italian of the time - Marquiz Muzio Frangipani - although few who eat frangipanes today are aware of the origin of their name. Shirley Temples are drinks named after Shirley Temple.
Ben and Jerry named one of their ice cream flavors after Jerry Garcia of the Grateful Dead (Cherry Garcia). And many restaurants frequented by celebrities have "honored" these celebrities by naming sandwiches after them (although presumably with the permission of the celebrity).
Lawsuits have been both won and lost over the use of celebrity names on products. Originators of
Love Me Blenders (frozen drinks) won the right to use this name over court protests by the "Love Me Tender" rights holders, but many more lawsuits have been lost, found by the courts to be in violation of one of the rights or laws mentioned above.
When dealing with celebrity names and images, it is always wise to get permission first before using their name in any commercial endeavor. Using a celebrity's name to advertise or promote your ice cream store could attract a lawsuit, although whether any celebrity, including Madonna, would bother suing over the use of their name on your ice cream is anyone's guess. It is possible, but I don't know how probable.
That said, there are probably SOME celebrity names that come with less risk of a lawsuit. Apple, Peaches, Cocoa, Peanut, Clementine, Carrot Top and Meatloaf are all celebrity names, but because the names are food names originally, they can be used. You just cannot connect these names to their human celebrity counterparts in your ads or promotions. And I am not sure Meatloaf ice cream sounds real appetizing, anyway.