It as mentioned by Dr.K.K.Pillai in 'Then Inthiya Varalaru', that One of the Ganga dynasty king was married to Rajendhra Chola's daugther, and that paved a way for Gangachodas Dynasty, which existde until mustim invasion on Great South India.
Amangai was given to Rajaraja narendran, to whom was born the great Abaya Kulothungan. According to 'Vengaiyin Mainthan', Arulmozhi, an other daughter of Rajendhra Cholan, was given to Ilango. Did RjC have three daughters? or somewhere the correct information had been lost?