Where does “xenogender” come from?

xenogender (English) comes from English gender, from Middle English gender, from Middle French gendre, from Latin genus, from Proto-Italic genos, from Proto-Indo-European ǵénh₁os, from Proto-Indo-European ǵenh₁- — to produce, to beget, to give birth.

xenogender (English): A non-binary gender that is defined not in relation to male or female but by characteristics connected to a thing or concept