You use Rename Related Accounts to find and rename related accounts.
To rename related accounts:
In Subaccount Options or on the Accounts view, select a related.
From the Accounts view, select Accounts, then Rename Related Accounts.
From Subaccount Options, click Rename.
In Find what, enter an account name to rename.
Options:
Click Find Next to find the account.
Match whole word only—Looks for the exact word or phrase.
Match case—Makes the task case-sensitive.