I have fallen in love with a woman whose name is also Deyanira. She lives in Mexico. Beautiful name is it not? It means the prediction of men. Its origins is believed to be from Greece. Characteristically it means a person of good character and able to make and have good and long lasting friendships. In love she would be very possesive of the one she has given her heart to and falls in love with ease. The reason you heard it on the tv show Hercules is because she was the last woman to be his wife.