Need to update the Organization Tree automatic process when division names changes.

We need to update the Organization Tree automatic process when division names change. The requirement is to display both historical data and the current updated divisions. What would be the best approach to achieve this, and how can we perform the update in bulk?

for example : Division [Commercial] to be renamed as [Customer] Here needs to show old and new updated division .

Can anyone suggest how we can do this process ? any sample files ?

Thanks in advance .

Thanks

Rajesh