Registration name, or rather, a magical name.
Just as legendary magicians all have various unique names and nicknames, scholars who focus on studying phenomena receive a name that exists only within boundless knowledge upon beginning their apprenticeship. It is either bestowed by their mentor or sought out by themselves. This name remains forever as a personal symbol, both in life and after death, and is often endowed with special significance and power, to the extent that legends of 'true names' have emerged.
Some scholars, even after death, have their names eternally preserved in their formulas. Just like 'Parasussell'—merely incorporating the special alloy represented by this name into a formula could increase the reactivity of metals by three percentage points.