That's odd... I *thought* I'd found a reference to "Ngaire" at Babynames.com, but when I double-checked this morning it said it wasn't in their database.
I guess you can scratch off that meaning of "flaxen", then. It didn't sound right to me, anyway, as I can't imagine the Maori tribe having that many blonde baby girls born to them. I'd go with the meaning of "kiwi" for that name. :)