Anisim or Onisim is a Church Slavonic rendering of the Greek name , i.e., Onesimus. As such, it is used an East Slavic given name and a Romanian surname. It gave rise to the patronymic surname Anisimov/Onisimov. Notable people with the name include:

Onisim of the Caves, Kyiv saint Onisim Bron (1895–1975), Soviet conductor Onisim Kler, Russian name of Onésime Clerc (1845–1920), Russian naturalist of Swiss origin Alena Anisim, Belarusian linguist and opposition politician Iosif Anisim, Romanian sprint canoeist

See also

Onesimus (disambiguation)