Full Idea
For the most part Locke used the word 'self' to refer to a momentary entity, and 'person' to refer to a temporally extended one.
Gist of Idea
Locke uses 'self' for a momentary entity, and 'person' for an extended one
Source
report of John Locke (Essay Conc Human Understanding (2nd Ed) [1694]) by R Martin / J Barresi - Introduction to 'Personal Identity' p.38
Book Reference
'Personal Identity', ed/tr. Martin,R /Barresi,J [Blackwells 2003], p.38
A Reaction
This might be quite helpful. Compare the word 'event' with the word 'history'. Many selves make a person, and presumably they don't need to be identical to one another, but they must be significantly connected.