What is "alapainui"

Alapai (full name: Alapainuiakauaua, known also as Alapai I or Alapai Nui, "Alapai the Great") (died in 1754) was a king of Hawaiʻi island in ancient Hawaii. He was an usurper to the throne, but was considered a good ruler, one who loved the common people, although there is a story that he was responsible for the death of High Chief Keōua Nui. His title in Hawaiian was Alii Aimoku.