This cannot be done by names applied to particular things; whereof I alone having the ideas in my mind, the names of them could not be significant or intelligible to another, who was not acquainted with all those very particular things which had fallen under my notice.
4.

A distinct name for every particular thing not fitted for enlargement of knowledge.
Thirdly, But yet, granting this also feasible, (which I think is not,) yet a distinct name for every particular thing would not be of any great use for the improvement of knowledge: which, though founded in particular things, enlarges itself by general views; to which things reduced into sorts, under general names, are properly subservient.
These, with the names belonging to them, come within some compass, and do not multiply every moment, beyond what either the mind can contain, or use requires.

And therefore, in these, men have for the most part stopped: but yet not so as to hinder themselves from distinguishing particular things by appropriated names, where convenience demands it.
And therefore in their own species, which they have most to do with, and wherein they have often occasion to mention particular persons, they make use of proper names; and there distinct individuals have distinct denominations.
5.

What things have proper Names, and why.
Besides persons, countries also, cities, rivers, mountains, and other the like distinctions of lace have usually found peculiar names, and that for the same reason; they being such as men have often as occasion to mark particularly, and, as it were, set before others in their discourses with them.

And I doubt not but, if we had reason to mention particular horses as often as as have reason to mention particular men, we should have proper names for the one, as familiar as for the other, and Bucephalus would be a word as much in use as Alexander.