Full Idea
Russell (and Frege) thought that Mill was wrong about names: really a proper name, properly used, simply was a definite description abbreviated or disguised.
Gist of Idea
Russell says names are not denotations, but definite descriptions in disguise
Source
report of Bertrand Russell (On Denoting [1905]) by Saul A. Kripke - Naming and Necessity lectures Lecture 1
Book Reference
Kripke,Saul: 'Naming and Necessity' [Blackwell 1980], p.27
A Reaction
It is tempting to oversimplify this issue, one way or the other, but essentially one has to agree with Kripke that naming does not inherently involve description, but is a 'baptism', without initial content. Connotations and descriptions accrue to a name.