Name symbolism doesn’t mean that names are to “mean” sth, but that names can symbolise or signify sth. Though we cannot disregard the fact that “fair” in Fairfax or the pun on Earnest and the character Ernest have a lexical meaning, I agree with the idea that in Wilde’s play, being a satire on the manners of the upper-middle class, the employment of names seems to accord more with the characters’ social stratum than merely with the lexical denotations of the word-names. As you’ve mentioned, “Jack”, for example, is what members of a lower class are named. But it brings to mind some connotations typical of a “Jack” like those of a Bohemian lifestyle, as we particularly notice in this play. What I seek in this discussion is more elaborations on these connotations with regard to the characters’ demeanours and social stratum.