The era of the Tamil Saiva Saints Thirunaavukkarasu Naayanaar and Thirugnanasampantha Naayanaar
Among the sixty three (63) - Tamil Saiva Saints (Thiruththondar) of the pre-medieval and medieval period Tamil Nadu, the Saint Thirunaavukkarasu Naayanaar, the Saint Thirugnanasampantha Naayanaar, and the Saint Suntharamoorththy Naayanaar are the three principal Saints- as gleaned from the Tamil Saiva religious work "Periyapuraanam" (alsoknown as the Thiruththondar Puraanam), composed by the sage/poetSeakkeelaar,
The above three along with the Maanikkavaasaha Swamihal are considered as the four great Saints of "Tamil Saivaism" of that period.
Period of the Pallava king Mahendravarman - 1
Thirutchiraappalli (in Tamil Nadu) we are made aware that the Pallava king Mahendravarman - 1 (A.D.575 - 630) (date as per "Pallankoil Jaina Copper Plate Grant" by T.N Subramanian)who ruled the northern region of the Tamil Nadu from his capital atKanchipuram, also bore the title "Gunabaran" among his many othertitles. Also in an Inscriptionat Kapotesvara temple at Chezarla in Guntur district (Karnataka), thereis a reference that `Mahendravikrama Maharaja' who bore the birudus"Gunabara" and "Avanibhajana" ruled from Kanchi situated on the banksof the river Vegavathi'.
In the "Periyapuraanam"under the narration of the life and times of Saint ThirunaavukkarasuNaayanaar, there is a reference that a Pallava king of his period builta Shiva temple at "Thiruvathihai" and named it as "Gunabara-eechcharam"(eechcharam = eswaram) after his title "Gunabaran".
Hence it is very clear that the Saint Thirunaavukkarasu Naayanaar livedduring the period of the Pallava king Mahendravarman - 1. It was duringhis time the Saint Thirunaavukkarasu Naayanaar embraced Jainism fromSaivaism, and later again re-embraced Saivaism. It was after this eventthe Pallava king Mahendravarman - 1 greatly influenced by this Saintalso embraced Saivaism from Jainism.
Period of the Pallava king Narasimhavarman - 1
Further from the Velurpaalayam Copper Plates from Tamil Nadu we are made aware that the Pallava king Narasimhavarman - 1 (A.D.630 - 668) son of Mahendravarman - 1 defeatedthe Western Chalukiya king Pulikesin - 2 at Vaathaapi the (presentBadami in the Karnataka State), and planted therein a pillar ofvictory.
A stone inscription ofNarasimhavarman - 1 found on a pillar closer to Dakkina Eerappan Templeat the present Badhami of his 13th year equivalent to Saka 565, whichconfirms his capture of Vathaapi in the year (565 + 78) A.D.643, wasprobably that pillar of victory.
Under the narration of the life and times of Saint Siruthonder in the same composition Periyapuranam,it is said that before he became a full time devotee of God Siva, hewas an army commander (Anukkan) of a Pallava king and bore the name"Paramjothi", and on whose behalf he went on a war expedition toVaathaapi in the north (defeated the Western Chalukiya king) andcaptured this ancient city.
Hence it is very clear from the above two references that it wasParamjothi who led the war expedition to Vaathaapi on behalf of thePallava king referred in the Periyapuraanam in the year A.D.643, was noother than the king Narasimhavarman - 1 son of Mahendravarman - 1. .
Also again from the narration of the life and times of the Saint Thirunaavukkarasu Naayanaar in the Periyapuranamwe note after he re-embraced Saivaism, on an occasion met the TamilSaiva Saint Siruthondar. This could have been only at a time after theVaathaapi have been captured by Paramjothi in the year A.D.643, andsubsequent to which he became a full time devotee of God Siva with hisnew name "Siruthondar".
Thirugnanasampantha Naayanaar in the Periyapuranam,we note soon after his "Upanayanam" (sacred thread ceremony), performedtraditionally to mark the point at which the boys of that period begantheir formal education at 5 years, he visited many sacred Saivitereligious places in Tamil Nadu.
This list of 95 Saivite religious places he visted would have taken 2 -years (if we take very approximately, that it took 1 - week to visiteach religious place in the days where there had been no faster mode oftransport like the present days), and finally he came toThirusengaattaankudi where he met the Saint Siruthondar. That meansSaint Thirugnanasampantha Naayanaar would have been 7 years (5 + 2)when he met Saint Siruthondar.
But we also note from the Periyapuraanam thatimmediately after the Vathapi war in A.D.643 Siruthondar became a fulltime devotee of God Siva and also got married. At a time he met SaintThirugnanasampantha Naayanaar, he already had a 5 - year old son whojust started his elementary studies ("Upanayanam") as gleaned from Periyapuraanam).That means it was in A.D.648 (643 + 5) Saint Siruthondar met SaintThirugnanasampantha Naayanaar who was by that time 7 - years of age.
Further from a collection of Thanippaadalhal(collection of individul Poems), we find a poem (as seen below), states the life period of Saint Thirugnanasampantha Nayanar was 16 years.
Periyapuraanam - by Seakkeelaar, Thiruppananthaal Sri Kaasi Madam, Sri Vaikuntham, Tamil Nadu.
Hence we can conclude that Saint Thirugnanasampanthar was born in A.D.641 (648 7) and demised in the year A.D.657 (641+16).
Further from the Periyapuranam underthe narration of the life and times of Saint Thirugnanasampanthar wenote, after meeting Saint Siruthondar he has visited 36 Saivitereligious places before coming to Mathurai to cure the Pandiyan kingSeer Nedumaran from his "Veppu Noi" (stomach ailment from heat) and his"hunched back"(due to an illness), and to re-convert him back toSaivaism from Jainism at the request of his queen Mangaiyarkkarasiyarand the chief minister Kulasiraiyaar.
This visit would have taken three quarter of an year - say one yearapproximately - after he leaving Saint Siruthondar (if we take veryapproximately, that it took 1 - week to visit each religious place )which would have been in the year A.D.649 (648 + 1). Immediately afterthese events he was met by the Saint Thirunaavukkarasar who also vistedMathurai. That is the last we know of Saint Thirunaavukaraser in thenarration of the life and times of Saint Thirugnsnasampanthar.
We also note from the narration of life and times of SaintT
> > Hence it is very clear that the Saint Thirunaavukkarasu Naayanaar > livedduring the period of the Pallava king Mahendravarman - 1. It was > duringhis time the Saint Thirunaavukkarasu Naayanaar embraced Jainism > fromSaivaism, and later again re-embraced Saivaism. It was after this > eventthe Pallava king Mahendravarman - 1 greatly influenced by this > Saintalso embraced Saivaism from Jainism. >
I am glad you refer the thirumurai and periya puranam for authenticating history. then do we ignore the fact from devaram that appar was tortured by mahendra varman.