When the King family are at Lihue airport in Kauai, Matt tells his cousin it's "just a little holoholo." In Hawaiian, "holoholo" means "to go out," usually for a leisurely drive. In the next scene, as the family rides in the cousin's jeep, lyrics in the musical cue include the phrase "holoholo ka'a," which means "going for a ride in a car."
When Matt King describes his inherited wealth, he says, "I don't want my daughters growing up entitled and spoiled. And I agree with my father; you give your children enough money to do something but not enough to do nothing." This is based on a well-known quote from billionaire investor Warren Buffett in a 1986 Fortune magazine interview. "Setting up his heirs with a lifetime supply of food stamps just because they came out of the right womb can be harmful for them and is an antisocial act. To him the perfect amount to leave children is 'enough money so that they would feel they could do anything, but not so much that they could do nothing.'"
King Kamehameha I became the first sovereign of the unified Hawaiian Islands in 1810. His last legitimate heir was Bernice Pauahi Bishop, who died in 1884. Margaret Ke'Alohilani and Edward King, the ancestors of the film's King family, are fictional.
One closeup briefly shows Elizabeth's Punahou School diploma. Punahou School, in Honolulu, is the largest private school in the United States. It was built in 1841 and added to the National Registry of Historic Places in 1972. Barack Obama graduated from Punahou School in 1979.