William Pitt Leleiohoku I (March 31, 1821 – October 21, 1848) was a Hawaiian noble during the Kingdom of Hawaii who married two notable princesses and served as Royal Governor of Hawaii island. Leleiohoku was born on March 31, 1821 in Kailua-Kona, Hawaii. He was the son of the Prime Minister Kalanimoku who was called The Iron Pillar of Hawaii and took the English name of William Pitt after British Prime Minister William Pitt the Younger. His mother was Kiliwehi, the daughter of King Kamehameha I. She named him in honor of the date of death of Kamehameha on the Hawaiian calendar, on the night of Hoku, Kaelo (May 14); Leleiohoku means "Fled in the time of Hoku" in the Hawaiian language. Other accounts give his mother as Kuwahine, who was another wife of Kalanimoku and a daughter of Governor