The respective case (so named by Anthony Appleyard[1]) is a noun case created by J. R. R. Tolkien in his constructed language Quenya (one of two of the elven languages which feature in The Lord of the Rings and The Silmarillion); Tolkien himself never named the case (at least, not in any of his published writings).
It is unclear whether this case is used with prepositions, transitive or intransitive verbs, or whether it has a more general use.
The seeming absence of any other case being used to translate this preposition lends support to this conjecture.
Ales Bican has written an article exploring these and other possible functions for Tolkien's respective/s-case.
[3] An example of inflection of the word cirya (ship) including the respective is present:[4][5]