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. Most archaeopronouns are not found in the english language.

Archaeopronouns flag by Tsao Kuan-lin (@sinophobis on Twitter).

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

List of archaeopronouns in various languages

Chinese

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

渠

彼

其 - pronoun used in Classical Chinese

he/hine/his - Old English masculine pronoun

heo/hie/hiere - Old English feminine pronoun

hit/hit/his - Old English neutral pronoun

Resources

https://people.umass.edu/sharris/in/gram/GrammarBook/GramPersPronouns.html