History
Prior to the unification of the Kingdom of Hawaii under Kamehameha I, Niʻihau was ruled by the aliʻi. Kahelelani was the first of the Niʻihau aliʻi. His name is now used to refer to the Niʻihau kahelelani, the puka shell of the wart turbans (Leptothyra verruca), used to make exquisite Niʻihau shell jewelry.
Kaeo was a ruler of northern Niʻihau who unified the entire island after defeating his rival, a chief named Kawaihoa. A stone wall (Papohaku) was built across a quarter of the southern end to mark the boundaries of the two chiefs: Kaeo's land was identified by black stones and Kawaihoa's by white stones. Eventually, a great battle took place, known as Pali Kamakaui. Kaeo's two brothers from the island of Maui, Kaiana and his half-brother Kahekili, the King of Maui, fought the battle for Kaeo and Niʻihau was united under his rule. Kawaihoa was banished to the south end of the island and Kaeo moved to the middle of the island to govern. Kaeo married the noble Kamakahelei and a future king of Niʻihau and Kauaʻi named Kaumualiʻi was born in 1790. Kauaʻi and Niʻihau are said to have carried the "highest blood lines" in the Hawaiian Islands.
Kamehameha managed to unify all of the islands by 1795, except for Kauaʻi and Niʻihau: Two attempts to conquer those islands had failed, and Kamehameha lost many men: the dead bodies covered the beaches on the eastern shores of Kauaʻi. Finally, in 1810, Kamehameha amassed a great fleet, and Kaumualiʻi, the last native aliʻi, surrendered rather than risk further bloodshed. Independence again became feasible after Kamehameha's death in 1819, but was put down when Kamehameha's widow Kaʻahumanu kidnapped Kaumualiʻi and forced him to marry her. Thereafter Niʻihau remained part of the unified Kingdom of Hawaiʻi.
Elizabeth Sinclair (later Sinclair-Robinson) purchased Niʻihau and parts of Kauaʻi from Kamehameha V in 1864 for the asking price of $10,000 in gold. Sinclair chose Niʻihau over other real estate options, including Waikīkī and Pearl Harbor. By around 1875, Niʻihau's population consisted of about 350 Native Hawaiians, with 20,000 sheep grazing the island. This era marked the end of the art of Hawaiian mat weaving made famous by the people of Niʻihau. Makaloa (Cyperus laevigatus), a native sedge, used to grow on the edges of Niʻihau's three intermittent lakes. The stems were harvested and used to weave moena makaloa (mats), considered the "finest sleeping mats in Polynesia". The mats were valued by aliʻi and foreign visitors alike, but by the end of the 19th century, Hawaiians had stopped weaving makaloa due to changes in population, culture, economics, and the environment.
In 1915, Sinclair's grandson Aubrey Robinson closed the island to most outside visitors. Even relatives of the inhabitants could visit only by special permission. Upon Aubrey's death the island passed to his son Albert, and then to Albert's youngest brother Lester and his wife Helen. Upon Helen's death the island passed to Lester's sons Bruce and Keith Robinson, the current co-owners of the island.
Niʻihau played a small role during the attack on Pearl Harbor on December 7, 1941. In what has come to be called the Niihau Incident, or the Battle of Niʻihau, an off-course Japanese pilot crash landed on the island and was captured by locals. With the assistance of local Japanese residents, the pilot escaped, but was later recaptured and killed.