The Aliʻi of Koʻolau were the rulers of Koʻolau Range on the island of Oahu, in ancient Hawaii. Ancient Hawaiians believed that the Chiefs of Koʻolau were the descendants of the god named Wākea. Chiefs could have different noble ranks; those who were born from the unions of full siblings had the highest known rank. The first ruler of Koʻolau was High Chief Kalehenui.