If you are a separate entity not purporting to act on behalf of or as part of the committee's organization, then they should have no say over what you name your club. What authority did they provide you that are relying on for their position? Did they send you a letter? How are you seeking to form your club, with what entity? You should ask them to state their official position in writing and take it to an attorney to explain your options.
Michel & Associates, PC
Civil Rights Attorneys
All my comments here are intended for general legal purposes. None of my comments here establish an attorney-client relationship with anyone. None of my comments should be relied on in taking legal action without first consulting an attorney.