2. (negative) does not belong to, did not belong to - this was the common form in classical Māori, but the alternative ehara inā/nō ... is the more usual negative for nā and nō in modern Māori.
(Te Māhuri Textbook (Ed. 2): 29-30;)
See also ehara nā/nō
3. (negative) is not, are not - affirmative sentences with a personal name beginning with ko are negated by ehara i a or ehara ko.
(Te Pihinga Textbook (Ed. 2): 43-44;)