Yes. You may change the display name of an account by setting its nickname in Online Banking.

To do this, click on the 'Edit' icon to the left of the name of the account:

 

Rename Account

 

On the next screen, enter the desired name in the "Nick Name" field and click "Save" when done:

Set Nickname

The Nick Name will now be set as the display name for the account on your account summary screen.