First Lessons in Maori
Use the specific particle ko when the predicate is either
A proper name, or personal pronoun, a local noun (§ 8), or either of the interrogatives wai, or hea; or
A common noun with any of the definitives (§ 18) except he.
Ko ia tenei, this is he.
Ko wai tona ingoa? what is his name?
Ko Hamo tona ingoa, his name is Hamo.
Ko toku whare tera, that is my house.
Ko hea tera maunga? What is (the name of) that mountain?