Lore:Nymic

Protonymics and neonymics, often simply called nymics,  make up an entity's incantatory name—sometimes referred to as a true name. They are employed as the focus for incantatory magic, allowing the user to gain substantial control over whom the nymic belongs to, typically by summoning or banishment.  However, if the entity possesses both a protonymic and a neonymic, speaking only one of them bears little to no effect.  

The invocation of an immortal Daedra's true name drains its "vital force" into Oblivion, which forces the entity to follow. It remains there until its vital force replenishes itself, a state which is described as "somewhat analogous to sleep for mortals". But as Daedra do not require sleep, it is viewed by them as a state "as close to the terror and despair of death" as they can experience. 

One historical usage of an 'incantatory name' was in the banishment of the Daedric Prince Mehrunes Dagon by an apprentice during the invasion of the Battlespire in  . The sorcerer Chimere Graegyn had previously invoked the Prince's protonymic at some point before  ; over two hundred years prior.  Lord Dagon's full incantatory name (as recorded) is Lehkelogah, Djehkeleho-dehbe-effehezepeh.  In addition to this, the Apprentice used the neonymics of three Daedra Lords, all of which were recorded within the notes of Dagon's lieutenant, Grand Vizier Imago Storm. 

Bosmer priests known as Namespinners can perceive protonymics of other people, and unweave it slightly and then chant a new suffix into it in order to alter the physical form of a person. This ability can be used to give antlers to Bosmer who are deemed worthy of this decoration.   

Related Terms
thumb|right|An Ambition using Mehrunes Dagon's egonymic to banish him from Nirn
An egonymic is a stronger, more potent version of a nymic. It is possible that only the Daedric Princes possess egonymics.  The Longhouse Emperors once entered into a bargain with Mehrunes Dagon whereby Dagon's egonymic was split into four parts and hidden within four mortal infants known as the Four Ambitions, granting them untold powers of destruction. Following the fall of the Longhouse dynasty, Dagon attempted to recover his egonymic by locating the Ambitions and harvesting the power they had nurtured. He planned to use this power to merge Nirn with his plane of the Deadlands, but an Ambition named   instead used Dagon's egonymic to banish him from Nirn. His egonymic was subsequently stolen by Lyranth the Foolkiller. 
The term nymic-path is referenced within Commentaries on the Mysterium Xarxes, Book 3, but its meaning is unknown. 
Daedric clans are known to have protracted tribunymics which are never spoken or revealed lest they be used as a weapon against them. 
Another related term is paleonymic, a name which can be used to bind a Daedra. 
Hieronymics are the classifications that Daedra use for each other (such as names and titles). They are supposedly outside of mortal understanding, as mortals don't live long enough to understand their nuances. 
Harmonic Astronymics is an ancient   text which seemingly deals with the   and how to harness their power. 
The term chrononymic is used in association with Sotha Sil (such as 'chrononymic will').  It also appears to be used in the context of Sotha Sil banishing Mehrunes Dagon. 

Notes
The true name of one of Vaermina's pets, a Daedric spirit called the 'Omen of Madness', is Ykal. 
Part of Malacath's true name is on the Brutal Bands. 
The topic of nymics was discussed by members of Lusty Argonian Historical Society in Frostfall  . The main point of the debate was whether a Daedra's protonymic changes or remains constant. 

References