MoneyBrilliant allows you to rename your accounts by providing them with a “nickname”.
You can give your accounts a nickname by accessing the Edit Account option via Settings/Connected Services.
From the Connected Services screen, navigate to the connection which holds the account you wish to add a nickname to. Once there tap on the account to access the Edit Account screen. This will take you to the Account Settings screen where you can add or amend your account nickname.
Once there simply type in the account nickname, click done and then Save.