There are a couple of different groups that have, at various times, taken over the Iolani Palace grounds and locked the public out. Iolani Palace was the formal residence of King Kalakaua, and then after he died, of his sister, Queen Liliuokalani. It is now an historical property under the protection of the Department of Land and Natural Resources and operated as an historical site by The Friends of Iolani Palace.
These two different groups of wannabes have no connection with King Kalakaua or Queen Liliuokalani or any of their descendants who are alive today. The leader of one of these groups, a woman, stopped short of declaring herself the queen of Hawaii, but the man who heads the other group has declared himself the King of Hawaii and his wife the Queen of Hawaii. He claims to be the grand nephew of Queen Liliuokalani, but I serously doubt that.
Queen Liliuokalani had several siblings and none of them had any children except for one sister. The sister's daughter, Princess Kaiulani, died at the age of 24; she had not married by the time of her death and had no children. So, it's quite impossible that this man is the grand nephew of Queen Liliuokalani.
The people in these groups really came across as...I don't even know what the right words are - "not all there mentally?"
Even the pro-sovereignty groups wanted nothing to do with those people.