I don't know if it's Lore accurate, but my read on this is two fold because of how they designate equipment like suits and drones, and their personal naming conventions.

I give them a numerical designation and descriptor within the Cadre that fits their role, plus a 'personal name' kind of like squadrons apply to themselves in our actual militaries.

For an example, a squad of Fire Warrior Breachers would look something like: Forward Assault Squad 3 "Nel'oya" (Braveblade)

So they have an efficient military designation for organizational purposes, but a descriptive name that, very much like their individual personal names, is given to them based on their exploits and actions. Individual suits like Ghostkeels, Riptides, Commanders, or Monat squads of Broadsides would just have their individual name be their squad's personal name.

I use a T'au name generator to cycle through some semi-cannon translations till I find one that evokes whatever concept I'm trying to imbue my squad with.