The name of each Hue lamp cannot be changed in HomePilot, but is set in the Philips Hue app. To do this, open the Philips Hue app and select Settings > Lamp settings.
The name that is entered here is the name that also appears in the HomePilot app after a short time. The description given here on the right image with "Living room" corresponds to the room to which the lamp is assigned in the Philips Hue App.