Unless a written record of its name can be found and deciphered, that name will probably endure.
Unless a written record of its name can be found and deciphered, that name will probably endure.
(If I'm remembering correctly, we do suspect a particular group mentioned in Mesopotamian records of being Harappan. It's still impossible to prove; you'd want a lot more evidence than "we think it was these guys" before renaming the culture. There is also no particular reason to believe that the Sumerian word for Harappans was related to the Harappan word for themselves.)
EDIT: found it - https://en.wikipedia.org/wiki/Meluhha
One good example: is the https://en.wikipedia.org/wiki/Land_of_Punt the same civilization as / continuous with the https://en.wikipedia.org/wiki/Kingdom_of_Aksum ? There's a lot of "circumstantial evidence" for that conclusion, but nothing definitive.
I think this still stands. Even if it has been mentioned, we'll have to find it and decipher. I would argue considering how famous it is in the nation, it'll be real hard to change the name even if the original is found.