Tamil Kings have recorded the grants they had made to Temple, Important events of their reign,their genealogy in Copperplates too, apart from Epigraphs in temples and other structures constructed by them. All Tamil Kings, Chera, Chola,Pandyas, Pallavas and others have recorded history thus.

One of the important Copperplates are found in Thiruvaalankaadu, Tamil Nadu. These Copperplates are named after the place and are called ‘ திருவாலங்காடு செப்பேடுகள் Thiruvaalankaadu Copperplates. These were by Rajendra Chola, son of Rajaraja Chola and they are from 10 Century AD.This Copperplate evidence traces the genealogy of Cholas from Ikshvaku ,who founded the Suryavansh to which Sri. Rama belongs This dynasty is also called Ikshvaku Dynasty.

Thiruvaalankaadu Copperplates of Rajendra Chola

Rajendra Chola, son of Rajaraja Chola.

The plate mentions King Perunarkilli, பெருநற்கிள்ளி, Chola Emperor. He performed Rajasuya Yaaga and was called as Perninarkkilli, who performed Rajasuya, ராஜசூய யாக வேட்ட பெருநற்கிள்ளி.The evidence also lists him as the first Tamil King of Kaliyuga.

Coming to the rulers of the Kali age, the first king mentioned is Perunatkilli who was born in this same family and was highly learned (v. 41).  In his race[12] was born Kalikala who renovated the town Kanchi with gold and established his fame by constructing flood-embankments for the river Kaveri.  The poet explains the name Kalikala as ‘the god of Death (Kala)’ either to the Kali age or to the elephants (kari) of his enemies
South Indian inscriptions https://www.whatisindia.com/inscriptions/south_indian_inscriptions/volume_3/no_205_aditya_ii_karikala.html#_ftn12(v. 42).   

Kaliyuga beginning date. It means that the existing Kali era is 5101 in 1999 AD, which comes to (5101 – 1999) 3102 BC.

Perninarkkilli. The Thiruvalangadu copperplates discovered in 1905 C.E. comprise one of the largest so far recovered and contains 31 copper sheets. The Thiruvalangadu plates contain text written in Sanskrit and Tamil. These two seem to have been written at least a decade apart. These plates record a grant made to the shrine of the goddess at Tiruvalangadu by Rajendra Chola I. The list of the legendary Chola kings forms the preamble to the Sanskrit portion of these plates. typical Chola copperplate inscription currently displayed at the Government Museum, Chennai’s, India, is dated c. 10th century C.E. It consists of five copper plates string in a copper ring, the ends of which area secured with a Chola seal bearing in relief, a seated tiger facing the right, two fish to the right of this. These three figures have a bow below, a parasol and two fly-whisks (Champaran) at the top and a lamp on each side. Around the margin engraved in Grantha characters, “This is the matchless edict of Kong Parakesarivarman, who reached justice to the kings of his realm”…

A portioned of this inscription is in Sanskrit and the rest is in Tamil.https://en.m.wikipedia.org/wiki/Tamil_copper-plate_inscriptions