Pronouns. Subject, object, possessive adjective, possessive noun, reflexive.
Male pronouns: he,him,his,his,himself
Female pronouns: she,her,her,hers,herself
neuter pronouns: it,it,its,its,itself,
'either' pronouns: s/he,him/her,his/her,his/hers,(him/her)self
Spivak pronouns: e,em,eir,eirs,emself
'splat' pronouns: *e,h*,h*,h*s,h*self
plural pronouns: they,them,their,theirs,themselves
Spivak is the name of some mathematician who invented the Spivak pronoun set. I used to know an intersexed person who insisted on everybody referring to em with Spivak pronouns. E annoyed almost everybody with eir pronoun-policing, though it did become kinda fun when you got used to it. There are a whole bunch of neutral and pronouncable pronoun sets that very much resemble the Spivak set, you listed about every one I've heard.