Nephthys (Aegyptie Nb.t-Ḥw.t /nǝpʼˈtʰħoː/ "Domina Adium," Coptice Ⲛⲉⲡⲑⲱ Nepthō) est dea Aegyptia, soror Isidis, uxor Seth, mater ex Osiride Anubidis.