Most likely fromOld Englishhēo,hīo(“she”), fromProto-West Germanic*hiju, fromProto-Germanic*hijō f(“this, this one”), fromProto-Indo-European*ḱe-,*ḱey-(“this, here”), but seeshe for more. Compareheo.
sche (accusativehire,genitivehire,possessive determinerhires,hiren)
sche