Proper names, according to what seems the better opinion, are, in their ordinary use, not connotative.

To say that they have no meaning may seem violent: if any one is called John Doe, this name, no doubt, means a great deal to his friends and neighbours, reminding them of his stature and physiognomy, his air and gait, his wit and wisdom, some queer stories, and an indefinite number of other things.

But all this significance is local or accidental; it only exists for those who know the individual or have heard him described: whereas a general name gives information about any thing or person it denotes to everybody who understands the language, without any particular knowledge of the individual.
We must distinguish, in fact, between the peculiar associations of the proper name and the commonly recognised meaning of the general name.
This is why proper names are not in the dictionary.

Such a name as London, to be sure, or Napoleon Buonaparte, has a significance not merely local; still, it is accidental.

These names are borne by other places and persons than those that have rendered them famous.