fatu umu ti fauai, fau-ai

fau,  s. the same as the purau tree. [Dav : 2372] (note)
fau,  s. a sort of head dress. [Dav : 2373]
fau,  s. a god, as being head or above; a king or principal chief was formerly called fau, as being above others. [Dav : 2374]
fau,  s. chef, tÍte, principal. [Jau :999]