Isaac Davis (c. 1758–1810) was a Welsh advisor to Kamehameha I, who recruited him to help conquer the other kingdoms in Hawaii, resulting in formation of the Kingdom of Hawaii. He arrived in Hawaii in 1790 as the sole survivor of the massacre of the crew of the Fair American. Davis and John Young became friends and advisors to Kamehameha. Davis brought western military knowledge to Hawaii and played a prominent role during Hawaii's first contacts with the European powers. He spent the rest of his life in Hawaiʻi and was known as ʻAikake.