How to get glyph names for feature file tweaking?

[sh1boot]

Using fonttools feaLib lookups.fea NotoColorEmoji-Regular.ttf I haven't been able to guess the names of the combined glyphs like "man zombie". I've tried u1F9DF_uni200D_male.ccmp, u1F9DF_200D_2642 and variations on that but no luck.

Is there a way to extract the names for use in GSUB hacking?

[sh1boot]

I meant to say what I'd been trying to do. A feature file like this:

languagesystem DFLT dflt;

@abc=[a b c];

lookup STUPIDIDEA {
    sub a @abc @abc @abc @abc a @abc' by a;
    sub a @abc @abc @abc @abc b @abc' by c;
    sub a @abc @abc @abc @abc c @abc' by b;
    sub b @abc @abc @abc @abc a @abc' by b;
    sub b @abc @abc @abc @abc b @abc' by a;
    sub b @abc @abc @abc @abc c @abc' by c;
    sub c @abc @abc @abc @abc a @abc' by c;
    sub c @abc @abc @abc @abc b @abc' by b;
    sub c @abc @abc @abc @abc c @abc' by a;

    sub                    a  a   a'  by b;
} STUPIDIDEA;

feature calt {
    lookup STUPIDIDEA;
} calt;

But with a replaced with u1F9DF (this part works), b replaced with something for the man zombie, and c replaced with something for the woman zombie.