Lucy Kaopaulu Peabody (1840–1928) was a high chiefess and courtier of the Kingdom of Hawaii. She served as a maid of honour and lady-in-waiting to Queen Emma of Hawaii. In 1905, she helped re-established and became the second founder of the Kaʻahumanu Society, a female-led civic society that had been chartered during the Hawaiian monarchy.
She was born in 1840, the daughter of Dr. Parker Peabody (1805–1849) and Elizabeth Kamakaila Davis. During her early childhood. she resided with her maternal grandparents at Waimea and Kawaihae, on the island of Hawaii. She was of mixed Native Hawaiian, American, and Welsh descent, known as hapa-haole in Hawaiian.
Her father was an American physician from New York who established a short-lived partnership with English physician Thomas Charles Byde Rooke, the uncle and hānai (adoptive) father of the future Queen Emma of Hawaii. Emma and Lucy were also both descended from the Hawaiian unions of King Kamehameha I's foreign advisors. Lucy's mother was the daughter of Kahaʻanapilo Papa, a scion of the Waimea line of chiefs, and George Hūʻeu Davis, the part-Hawaiian son of Isaac Davis, a Welsh sailor from Milford Haven, who alongside Englishman John Young (the grandfather of Emma) served as military advisor of King Kamehameha I during his conquest of the Hawaiian Islands.