Abstract. – In this article, data concerning the all-Polynesian fish god Tinirau are collected. Tinirau was a chief or at least son of a chief. The study of the Proto-Polynesian rock picture of Fiji allows to realise main symbols and ideas of the Proto-Polynesians. On this basis, some rock pictures of different Polynesian islands are decoded. The cult of Tinirau was widespread in these places, and this fact is beyond question. This god was strongly associated with the moon goddess Hina. On the other hand, this brave hero was related and at one time was even equal to the lord of the ocean known as Tangaroa. The trinity structure of the sea deity is discovered. Besides, the semantics of two types of Rapanui wooden artifacts is understood. The Austronesian influence is revealed in the Ainu and Japanese cultures. At last, a selection of some rongorongo inscriptions (Easter Island) is read and interpreted. Such records serve as a reliable key to many Polynesian petroglyphs.
[Fiji, Marquesas Islands, Society Islands, Easter Island, Tinirau, Tangaroa, Hina, the rongorongo script]