c. 1400; a shift in felt meaning of the first element of himself (q.v.) from dative to genitive created this new word, but the same process did not change herself.
Entries linking to hisself
himself pron.
Old English him selfum, from dative/accusative personal pronoun him + self, here used as an inflected adjective.
herself pron.
emphatic or reflexive form of third person feminine pronoun, Old English hire self; see her (objective case) + self. Originally dative, but since 14c. often treated as genitive, hence her own sweet self, etc. Also compare himself.