Persephone is the name of a character in the Matrix movies. She's married to The Marovingian, a powerful lord of the underworld. (Hmm, we wonder where they got that idea?)
In some myths, the Erinyes (a.k.a. the Eumenides or the Furies) are the daughters of Persephone and Hades (source).
Hades is the bad guy in Disney's Hercules.
With the help of her husband, Percy Bysshe Shelley, Mary Shelley wrote a drama called Proserpine, based on Ovid's version of the myth. We guess she was a fan of themes of death and resurrection, considering her famous novel Frankenstein.
In one story, Persephone changes Minthe, a nymph lover of Hades, into the plant we know as mint, all because the nymph bragged that she was better than Persephone (source).
Demeter was the goddess of agriculture and grain. The Roman name for Demeter was Ceres; it's from this name that we get the word "cereal."
There's a great band called Persephone's Bees. Check them out.
In one obscure myth, Persephone is responsible for the creation of mankind (source).