Tamil and Sanatana Dharma are so intermingled that one finds numerous references to The Tamils and Tamil Kings in the Rig Veda, Ramayana, Mahabharata and other Puranas.
I have written quite a few articles on this.
The Chola Kings trace their ancestry to the Solar Dynasty.,Surya Vamsa.
Chera King Udiyan Cheralaathan fed both the Kaurava and Pandya armies.
Krishna killed a Pandyan King(5:48)
Chera and Chola Kings were defeated by Krishna (7:11)
King Sarangathdwaja wanted to attack Dwaraka to avenge his father’s Death, the Pandya King, after obtaining weapons from Bhisma, Drona, Balarama and Kripa.
However wiser counsel prevailed and he dropped the idea.
Later he fought alongside the side of the Pandavas against Drona(7:23).
He was rated as an Athiratha by Bhishma( (5,172)
When the mighty Pandya, that foremost of all wielder of weapons, has been slain in battle by the Pandavas, what can it be but destiny?(9:2)
Pandya, who dwelt on the coast-land near the sea, came accompanied by troops of various kinds to Yudhishthira, the king of kings (5:19). There hath come Pandya. Remarkably heroic and endued with prowess and energy that have no parallel, he is devoted to the Pandava cause. (5:22).
Pandya was present during the Rajasuya ceremony of Pandava King Yudhisthira.
The Kings of Chera and Pandya, brought numberless jars of gold filled with fragrant sandal juice from the hills of Malaya, and loads of sandal and aloe wood from the Dardduras hills, and many gems of great brilliancy and fine cloths inlaid with gold.
Singhalas gave those best of sea-born gems called the lapis lazuli, and heaps of pearls also, and hundreds of coverlets for elephants (2:51).(2:36,43).
Pandya King took part in the event Panchala princess Draupadi’s Swayamvara (MBh 1:189)