Deyanira \de-yanira, deya-ni-ra\ as a girl's name is of Spanish and Greek origin, and the meaning of Deyanira is "devastating, capable of great destruction". Greco-Roman mythology: the wife of Hercules, who managed to kill him by trickery.
Deyanira has 7 variant forms: Daianira, Dayanira, Deianira, Dellanira, Diyanira, Neera and Nira.
For more information, see also the related name Deja.