New Zealand English (through Māori influence) has this, in names like Ngaire and places like Ngaio. This said, a lot (perhaps most, though it'll be regional I expect) of speakers will pronounce it as though the 'g' isn't present.
A couple of years ago I had a geology class in which the lecturer (albeit a non-New Zealander) consistently pronounced Ngāuruhoe with initial /n/. Interesting to know that New Zealanders pronounce it with /ɡ/ instead. (I, of course, pedant that I am, insisted on pronouncing it with an initial /ŋ/.)