her – её, свой, своя, свое

her (objective case)
Old English hire, third person singular feminine dative pronoun, which beginning in 10c. replaced accusative hie (see he). Cognate with Old Frisian hiri, Middle Dutch hore, Dutch haar, Old High German iru, German ihr.

her (possessive case)
Old English hire, third person singular feminine genitive form of heo "she" (see she).

Во втором случае, это и есть её.
«He», см. выше – «се», как и «she». Так же "своё"