What are the names of Elsa and Anna's parents?

Elsa and Anna’s parents are King Agnarr and Queen Iduna. They are the former rulers of Arendelle and the parents of the two royal sisters.

In Frozen, Agnarr and Iduna die during a sea voyage while searching for answers about Elsa’s powers. Frozen II expands their history through a childhood story told by Agnarr and through memories preserved in Ahtohallan. The sisters learn that Iduna was Northuldra and that she saved the young Agnarr during the conflict between Arendelle and the Northuldra.

That revelation changes the family’s history: Elsa and Anna descend from both the Arendellian royal line and the Northuldra people. Agnarr was the son of King Runeard, so Runeard is the sisters’ grandfather, not their father. “King and Queen of Arendelle” describes their roles but is not their individual name, while Queen Elsa is Anna’s sister and daughter, not her mother.