I'm pretty sure unique item names are put together randomly, based on a whole series of words/names/adjectives and whatnot.
Not sure that we're manually creating unique items.
There is a topic about this here:
https://forum.battlemaster.org/index.php/topic,7728.msg158136.html#msg158136They are random yet often based on various old/significant role plays.
But it is not done through player input directly.
Putting out requests for certain items/item names would be really neat, and enrich the amount of in game refrence with items.
Yet the extra work it could take might not be worth it.