Polo, the Moon, is the second of the two luminaries whose names form the compound Donyi-Polo ('Sun-Moon'), the indigenous religion of the Tani peoples. Conceived as Abo Polo, 'Father Moon,' he is the male complement to the female Sun, Ane Donyi, and shares in her role as visible manifestation of the formless supreme power and as witness to truth. Donyi and Polo are rarely separated in cult or invocation: the pair, not either luminary alone, constitutes the deity to whom the faith is addressed.