Sivaji is the name of a great legend sivaji ganesan, so no one think its a tamil name or not...the same way Sujatha may be a sanskrit name....sure both are not English or Hindi names..there wont be problem in Tamilnadu...Remember "Mumbai Express" and "Sachin" were released on the same day...All opposites are against mumbai express.. no one thought about sachin that time...since its a lovely name...