Ponniyin Selvan Varalaatru Peravai

Hi,

I read in the article "A BRIEF HISTORICAL SURVEY ON
MEDIEVAL CHOLAS AND THEIR RELATIONS WITH THE CHERAS {KERALAS} OF THE
CONTEMPORARY PERIOD" that Rajendra chola -1 was born to
Vanavanmadevi of Thirukovalur clan. As per 'Ponniyinselvan'
and 'Nandhipurathu Nayaki' Rajendra-1's mother is Vanadhi of
kodumbalur clan. Also rajaraja's mother is vanavanmadevi of
thirukovilur clan.
What is vanadhi's real name? Is vanadhi a fiticious character? To
which clan she actually belongs?

Priya.