Archaeopronouns

Archaeopronouns are third person pronouns and forms or pronouns that were used in the past and are no longer in usage. However, some non-binary people may reclaim them and use these pronouns to express their gender in language.

One example can be Classical Chinese pronoun "其", used by some Chinese non-binary people.

Chinese
伊 - used historically in 1870-1930 as an exclusively feminine pronoun.

渠

彼

其 - pronoun used in Classical Chinese