Grebe Place – not on library website and De Lange Street which was on the library website but had no information.
Both are modern streets so no point searching Past Papers. Grebe is a bird so it is likely to be named after this bird. As this is Wigram I would assume any street names to be aviation related but couldn’t find anything related to De Lange. It does sound like someone’s name.
Again it was a couple of boring streets with modern houses
I have done more research by visiting Airforce Museum which is a great place to visit. Grebe Place is likely to be named after the Gloster Grebe biplane. Found limited information about De Lange Street but mostly likely named after Theo de Lange 1914 to 2005 who was a senior officer in the RNZAF. He was awarded DFC in 1944 and CBE in 1965. I have found references to De Lange Cup and De Lange Trophy both being awarded to pilots. Possibly cup and trophy references refer to the same item.
Lytteltonwitch's Walking the streets of Christchurch Project 