Some people insist that you should use the phrases the former and the latter only to refer to the first of two things and the second of two things, respectively: “But Flynn preceded Casey, as did also Jimmy Blake, and the former was a lulu and the latter was a fake” (Ernest Lawrence Thayer).

It is easy to find violations of this rule in the works of good writers, but since former and latter are comparatives, many readers feel uneasy when the words are used in enumerations of more than two things, just as they would feel uneasy over the similar incorrect use of a comparative in a sentence such as Her boys are 7, 9, and 13; only the younger was born in California