The 2nd list of place names definitely must be considered:

"vai tara kai uo a ngao roaroa a ngao tokotokoa

The correct name for this well-known and important watering place is 'Vai Tara Kai Ua', which is located in the hills west of Anakena. So far, no explanation has been found for the additional names 'a very long neck' and 'a neck (as long as?) a pole'." (Barthel 2)

The very long neck seems to refer to the moe glyph type. In Barthel's correlation with moon phases he has assigned this (the 18th place) with the very last phase of the moon, i.e. when moon is regenerated.

Vai tara kai ua possibly should be translated as the cardinal point (tara) where water (vai) assembles (kai) from the rain (ua) - i.e. when in spring the sun is climbing very high on his pole.