Thanks so much for your help! 
 The first official use of the name Chennai is said to be in a sale deed, dated August 8, 1639, to Francis Day of the East India Company, even before the Chennakesava Perumal Temple was built in 1646, while some scholars argue for the contrary. 
 Could you give me some information on Chennai? 
 Can you explain more about the name Chennai? 
 Can you tell me about that?
The first official use of the name Chennai is said to be in a sale deed, dated August 8, 1639, to Francis Day of the East India Company, even before the Chennakesava Perumal Temple was built in 1646, while some scholars argue for the contrary.