Top ten toxic substances listed in ToxFaq that could be good female first names, possibly good gaming names.
10. Ethion
9. Toluene
8. Toxaphene ("Toxie" for short)
7. Beryllium
6. Cadmium
5. Phosgene/Phosphine (tie)
4. Mirex
3. Endrin
2. Dichlorvos
(drumroll)
1. Antimony