The area names is dependant on the City name that is filled in for the streets in the area. you will first have to correct the City name in all the streets in the area. If this is not possible ( this has been known to happen from time to time the corrections for City names have to be submitted to WAZE via https://world.waze.com/support/
. Just type in your question (e.g. "change city name" and several options will be presented.
You will most likely need to submit a peralink to the area.