Assigning a name to a specific Pixhawk

I have a number of aircraft all flying with pixhawk and Plane v3.3 to 3.5. When using telemetry linked to a ground station all the logs land up in MissionPlanner/logs/fixed wing/1. This becomes confusing when flying more than 1 plane on a day or even in the same hour. Is there any way of assigning a name to a specific pixhawk so that the data follows suit? Eg “RVJet”, “MTD” or “Penguin”?
Many thanks

normally, you would set different different SYSID_THISMAV for each…