themselves

pronoun[with oneself]2

1. •
   the people or things already talked about, as the ones that do an action and the same ones it is done to or for

   • They’ve hurt themselves.
   • They fought among themselves.
2. •
   The reflexive case of they, the third-person singular personal pronoun. The single person previously mentioned, as the object of a verb or following a preposition (also used for emphasis).

   • Would whoever stole my phone please make themselves known.
   • I don't want anyone to fight among themselves.