User blog comment:Hjetland/some ''ground rules''/@comment-32419585-20181124084421/@comment-34246601-20181124130234

Well it kind of came from a mistake (as both the Old Norse "ðeir" ond the Old English "ðá" meant more than one) - but was then heavily shoved by Feminists from about the '50s or '60s, who sought to kill off "he" with this meaning.