The information we get from Purans and Ancient Tamil Sangam Literature and Copperplates evidence reaffirm the close proximity,nay the total identification of ancient Tamil Kings and Genealogy as listed out in Purans. References in Ramayana and Mahabharata also reaffirm.
Kulya (Prince of Andhra and whose descendants were Pallavas and Tondai Kings), Chola (Founder of Chola Kingdom and Dynasty), Pandya (Founder of Pandya Kingdom and Dynasty), Kerala (Whose descendants were Cheras) - Because of these kings Dravida Country (Tamil and Sanskrit are the two eyes of this country) was developed.
The girl was named Matsyagandha which means "the one who smells of fish"; due to her upbringing, she retained this characteristic for a time. She was Satyavati, who later married Shantanu and who was the mother of Sage Veda Vyasa, and thus the great-grandmother of the Pandavas and Kauravas. The boy was named Matsya because he was born out of a fish; he founded the Matsya Kingdom. His descendant was Virata who founded the kingdom's capital Viratanagara. Vasu and Girika had five sons: Brihadratha (Maharatha), father of Jarasandha, the prince of Magadha Kingdom; Pratyagraha, the prince of the Chedi Kingdom, whose descendant was Shishupala; Kusamva (Manivahana); Mavella; and Yadu.
From the genealogy it transpires that the Earliest Chozha kings seem to have been present in the North of Vindhyas , annexed and ruled the areas of South. Sibi is referred to as Sivi in the North and he ruled from there.
Ancient Tamil Kings used emblems in their reign. They had Bow, Tiger and Fish for Chera, Chola and Pandya respectively. These were used as Stamps in Coins and royal messages. Signet Rings also carried these. All these have their histories.