Full Idea
A common source of the view that proper names must have referents is that they are not descriptive (as expressed by Kripke).
Gist of Idea
Proper names must have referents, because they are not descriptive
Source
report of Saul A. Kripke (Naming and Necessity lectures [1970]) by Mark Sainsbury - The Essence of Reference 18.2
Book Reference
'Oxford Handbook of Philosophy of Language', ed/tr. Lepore,E/Smith,B [OUP 2008], p.399
A Reaction
Sainsbury observes that there might be some other way for a name to be intelligible, with describing or referring.