Dear Dr Kailasam What you are having is similar to dejavu...its a feeling of familiarity in a completely unfamiliar surroundings...in mordern psychological terms....Though Parthibendran was a historic person Nandhini was a figment of Kalkis imagination...
The other possibility is passive learning your mother may have read PS when you were pregnant or discussed and you have imbibed it A la Prahaladha and thirumal naamam...
If you genuinely want to second guess if your poorva janma cocept is true try guessing what happens tp Parthibedran in Nandhipura nayagi which is a loose sequel to PS
> The other possibility is passive learning your mother may have read PS when you were (SHE WAS)pregnant or discussed and you have imbibed it A la Prahaladha and thirumal naamam...