Kapaiwai Tuimacilai Mara (born between 1815 and 1820 – 6 August 1859), chiefly seafarer, and descendant of the Vunivalu of Bau.
Ratu Mara won fame by sailing his canoe to Tonga, an act of unprecedented audacity for a Fijian seafarer.
Returning to Fiji with Ma'afu in 1847, he finally fell out with Ratu Cakobau and was forced to take refuge with Qaraniqio of Rewa.
He allied with him and other chiefs, including Koroi Ravulo of Vusaradave, Tui Levuka and Tavo of Wainikelei in Moala, whoom he used his influence to support his ventures among his kin such as the Wairiki War, and the Highland War in a formidable coalition dedicated to the destruction of Ratu Cakobau.
The wounds caused by the hanging of Ratu Mara were secretly nursed by his descendants, but it eventually surfaced during the time of his grandson, Ratu Sir Lala Sukuna when he removed himself and his younger brother, Ratu Tiale Vuiyasawa and his sisters away from the Tui Kaba Registration of Births (Vola ni Kawa Bula) to that of the Vuanirewa Registration in Lakeba, Lau under their mother, Adi Litiana Maopa, who was the sister of the Tui Nayau, Ratu Finau.