On-line Te Reo Māori Dictionary

Kei raro a Ōamaru i Murihiku.
Oamaru is north of Murihiku.
In, on, by, under... - kei runga...

Ko Tūhawaiki te rangatira o Murihuku i tērā ray tau.
Tūhawaiki was the chief of Murihiku last century.
Possessives - 'o' class - ō, tōku...