Nancy Wahinekapu Sumner Ellis (March 9, 1839 – January 10, 1895) was a Hawaiian high chiefess during the Kingdom of Hawaiʻi. She was the daughter of William Keolaloa Kahānui Sumner, a hapa-haole Hawaiian chief, and Manaiula Tehuiarii, a Tahitian princess. Caption: Miss Nancy Sumner (Afterwards Mrs. Ellis).