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- (Rāmanāthapuram) Ogamai
- (Rāmanāthapuram) Ottaikkudi
- (Tirunelveli Kattabo) Ovari Sānārkudi
- (Thoothukkudi) Odaikkarai Sānārkudi
- (Villupuram) Odiyandal
- (Tiruppur) Orattuppālaiyam
- (Karur) Ondāmpatti
- (Villupuram) Oddampālaiyam
- (Tiruppur) Osaipālaiyam
- (Tiruppur) Olaippālaiyam
- (Karur) Odappatti
- (Karur) Ottanāyanūr
- (Villupuram) Ogaiyūr
- (Dindigul) Ottanāgampattipudūr
- (Dindigul) Ottanāgampatti
- (Perambalur) Ogalūr
- (Perambalur) Olaippādi
- (Dindigul) Ondivādanāyakkanpatti
- (Dindigul) Ottaikkālanpatti
- (Dindigul) Odaippatti
- (Dindigul) Odaippatti
- (Dindigul) Odaikkarisalpatti
- (Villupuram) Oddankāduvetti
- (Ariyalur) Ottakkovil
- (Ariyalur) Orattūr
- (Ariyalur) Ottakkovil
- (Villupuram) Oddanandal
- (Villupuram) Orattūr
- (Villupuram) Olukkai
- (Villupuram) Orukodi