Council has responsibility of naming suburbs but is not specific.
In my youth I lived in Elgin St, close to Great North Rd. We lived in the suburb of Arch Hill then and even had our own parliamentary electorate. Arch Hill took in the northern side of Great North Rd and embraced Elgin, Grosvenor, Harcourt and Beaconsfield Sts, among others. Maps seem to imply Arch Hill covers only the southern side centred on Bond St. Could you enlighten me please? Also, are there any specific boundaries set for Auckland City suburbs, as these seem to be dictated by the whims of real estate agents and their ilk. Lyle Fraser, Chatswood.
Arch Hill was named by early settlers who farmed in the area, after their home farm in Northern Ireland, according to Wikipedia. Other records suggest it was named for the topography of the area.
Whichever, it did indeed have its own electorate, created for the 1946 elections from bits of the Auckland Central, Auckland West and Grey Lynn electorates.
Terralink, which provides location data to emergency services, says that it is not just a matter of locating these streets in so-called "vanity suburbs".