Change your Canvas display name
To change your display name, click Account and then click on the sub-menu Settings.
To edit your name, click the Edit Settings button on the right.
You will be able to edit your display name:
Note: The name you have chosen here will only be seen in the discussions, messages and comments areas. Your instructor will be able to see the name you've chosen here but your official name will be listed in the people and grades areas. This only affects your display name within Canvas, and not in other systems.
Click Update Settings when you are finished.