William Keolaloa Sumner

William Keolaloa Kahānui Sumner, Jr. (c. 1816 – May 25, 1885) was a high chief of the Kingdom of Hawaii through his mother's family; his father was an English captain from Northampton. Sumner married a Tahitian princess. Aided by royal family connections, he became a major landowner and politician in Hawaii.

After contracting leprosy in 1877, by law Sumner was exiled to Kalaupapa, Molokaʻi. He served there as luna (superintendent) of the leper colony from 1878 to 1884. He died of leprosy in a Honolulu hospital in 1884.

Early life and family William Keolaloa Kahānui Sumner, Jr. was born circa 1816, the eldest son of Captain William Sumner (1786–1847) and High Chiefess Keakua'aihue Kanealai Hua. Captain Sumner, from Northampton, was an early settler of Hawaii who arrived in 1807 as a cabin boy. Befriended by Kauai's king Kaumualii, Sumner later became a naval captain under King Kamehameha I, who united the Hawaiian Islands in 1810. Related to the Kamehamehas through Uminuikukaailani, his mother family descended from the famous twins Kahānui and Kaha‘opulani, the Kohala chiefs who reared Kamehameha during his infancy. His mother was also a cousin and hānai (adoptive) sister of High Chiefess Ahia Beckley, wife of Captain George Charles Beckley, who was one of the reputed designers of the Flag of Hawaii. William had younger siblings: John Kapilikea Sumner (1820–1915) and Maria Sumner (1824–1908). Maria married Henry Sea and later Robert Grimes Davis.

Both Sumner brothers married Tahitian princesses. William married Manaiula Tehuiarii. John married her cousin Princess Ninito, who had been formally betrothed to Prince Moses Kekūāiwa. With Manaiula Tehuiarii, he had his eldest daughter Nancy Wahinekapu Sumner (1839–1895). After Manailua's death, William married Mauli Tehuiarii; their daughter was Elizabeth Keawepoʻoʻole Sumner (1850–1911). Both Nancy and Elizabeth Sumner served as ladies-in-waiting at the Hawaiian royal court. Through both daughters, Sumner has living descendants.

Career Sumner and his brother John bought the land of Mōkapu from High Chief Abner Pākī in 1856. This land passed to his brother after William's death, and then to their sister Maria and her children from her second marriage with Robert Grimes Davis. The former Sumner landholdings in Mōkapu, along with other parcels held by other Hawaiian landholders in the region, were later acquired by the United States government and developed as the Marine Corps Base Hawaii.

Sumner was elected to the House of Representative for Oahu with a seat for the regular session of the Legislature of 1855 but, according to American Commissioner to Hawaii David Lawrence Gregg, he did not appear to serve for an unknown reason. The legislative roster for 1855 listed his name as "William Sumner Keolaloa." The records of the House of Representatives however indicate that a "W. S. Keolaloa" participated in the legislative sessions. Either way, Sumner was defeated for reelection in the summer of 1855. On January 16, 1864, he was commissioned first lieutenant of the 1st Company of the Yeomanry, a volunteer army regiment in the military of Hawaii.