O (Salem) Oddappatti (Salem) Ottukkādu (Dharmapuri) Odduppatti (Namakkal) Odakkattūr (Dharmapuri) Odachchālpatti (Namakkal) Ottakulampudūr (Namakkal) Ottaiyūr (Namakkal) Olaippatti (Namakkal) Odappālaiyam (Namakkal) Oravandūr (Karur) Odaiyūr (Namakkal) Oviyampālaiyam (Namakkal) Olaippālaiyam (Namakkal) Olurappatti (Namakkal) Oduvankurichchi (Namakkal) Olaippālaiyam (Salem) Odayārpatti (Salem) Omayanūr (Thanjavur) Ottangādu (Nagapattinam) Olugamangalam (Salem) Olavakkodu (Salem) Oddateruvu (Salem) Ondivīranūr (Salem) Omakavundanpatti (Salem) Oddateruvu (Salem) Ondimāmaruttuppatti (Theni) Okkaraipatti (Theni) Odaipatti (Cuddalore) Odalappattu (Puducherry) Odiyambattu 3 4 5 6 7