Rajaraja's daughter was also called Kundavai - after his sister. She married the Vengi prince Vimaladitya (right, history buffs?) who was different from Vandhiyathevan.
I am sure other more knowledgeable sources here will clear up all your other doubts.
-latha
ps.
I'm leaving the original email for easy reference.
Perfectly coreet ba....Raja raja nin magaL peyarum Kundavai than. She is the one who is married to vengi prince Vimaladityan :).
And regarding "3) Melum Kundavai - Vimaladityan (vandiyathevan) thirumanam patriaya kurippu raja uravugalai mempadutha yetpatra kalyanam pola kurippitullare?" , give me two more days. I will upload a journal paper on "royal alliances" in the chola period.