Yes. There can be several Casambi devices in the same network with the same name simultaneously and no issues would occur.
However, it is best practice to uniquely name each device in a network for easier identification and programming. You can pair each unit, "Identify" them, and then rename the devices accordingly in the 'Luminaires' tab after double-tapping the unit. Sensors and Switches can be renamed in their corresponding sections of the 'More" tab.