Southern Tamilnadu History(தென் தமிழக வரலாறு)

Mukkulathor or Mukulathaar (Tamil: முக்குலத்தோர்) is used to refer to the trinity of ancient royal lineages. It can be roughly translated as "people of the three clans", a reference to the three aristocratic clans (Kallar, Maravar and Agamudayar) which have supplied the Tamil country with most of its royal dynasties and warriors. Mukkalathors are reverently addressed to as "Thevars," meaning "Great Lord" by other Tamils.

Clans 
The Kallar, Maravar and Agamudaiyar communities constitute theKshatriya or warrior class of TamilNadu, South India. They are all believed to have originated from an ancient people called kalabhrar.

Kallar 
Kallar (Tamil: கள்ளர்) is one of the three communities which constitute the Mukkalathor confederacy. European eyewitnesses of the 18th century have made mention of Kallars as "a fearless tribe show many signs of independence and non-submission to any form of subjugation". They were expert soldiers and constituted the bulk of Chola and Pandya armies. One of the principal weapons of the Kallars is the boomerang. This has evoked comparisons with the Australian aborigines and vouch for the theory that Kallars were one of the earliest people to inhabit the Indian subcontinent. The principal occupation of Kallars is farming. Kallars are found largely inMadurai, Sivagangai, Thanjavur, Trichy, Theni and Ramanathapuramdistricts of Tamil Nadu. One of their popular deities is Kallazhagar who is a warrior form of Lord Thirumala or Venkadavan. There are various sub-castes of Kallars amongst whom the Ambalakarar is the most important.They were a warklike people who strongly resisted every British attempt to subjugate them. They are found in Madurai and Sivaganga districts. In these districts, each village is headed by an Ambalakarar (president of an assembly) and the Ambalakarars took upon themselves the power to adjudicate disputes that arose among the inhabitants in the "nadu", belonging to different castes. They used to hear complaints, hold inquiries and punish the offenders. They wielded considerable powers to intervene in any kind of transaction or transfer of property among the people. No land could be alienated from one man to another without the permission of the Ambalakarars. Another important Kallar subcaste is the Piramalai Kallar. They are highly conservative and have preserved their customs and traditions to the present day. They are also believed to be the oldest inhabitants of the Tamil country with reports of their presence going back to Tamil literary works of the 4th century B.C. They are found mainly in the districts of Madurai and Theni. Their popular deity is Amman, the Mother Goddess. It is believed that the Maravar people, the Agamudayars, Thanjai Cholarkula Kalla Nattars, Pandiya Vellalars, Chola Vellalars, Chera Vellalar, Vellala Mudaliyars, Agamudaya Mudaliars,Conjeevaram Mudaliars and Udayars have all descended from Kallars. 
Maravar
Maravar (Tamil: மறவர்), are one of the oldest social groups to be mentioned by the Sangam Tamil literature. This indicates an association with the Tamil land which is at least 2,000 years old. The writers of the Sangam Age place them in rural settlements withdrawn from cities. Maravar, in Tamil, means a warrior. Maravars are the courageous breed and were involved in the major wars that Tamilnadu witnessed. Other historians postulate that Maravar is derived from Tamil language term Marutham (called as Thinnai). They originally lived in (See Ancient Tamil country). The name of the city Madurai is also postulated to be derived from Maruthai and honorific title of local Pandya kings. 
Agamudayar
Agamudayar (Tamil:அகமுடையார்) also known as Agam Padaiyar or defending soldiers (or in pure Tamil, Agam udayar means: Agam - prestige, Udayar - having) indicating a specialization as soldiers/ rulers. Agam can also be compared with heart, (as in "Agathin Azhagu Mugathil Theriyum"), and can be interpreted as, "people with a good heart". Although their name is attested later in literature, they and the culture is indigenous to the area and are ancient in origins. Thevars of ramanthapuram district are given the title Servai. Some believe these castes formed as part of military formation of Kallap-Padai or hustlers, Marap-Padai or soldiers and Agap-Padai or defenders, There is lot of evidence has been put forward towards this theory.One among this is chola king raja raja who has udayar surname married a vellala girl of kodumbalur velir there son was called as rajendra chola. 'கள்ளர் மறவர் கனத்ததோர் அகமுடையார் மெல்ல மெல்லவே வெள்ளாளரானார்' 
History 
Origins
There are diverse theories with regard to the origin of Mukkulathors. DrSpencer Wells and Dr. Pitchappan have found an ancient DNA marker in the blood of Kallar that links them to the very first modern humans who migrated out of Africa about 60,000 years ago and travelling through the southern coastline of Asia had eventually reached Australia. Based on this theory, it is assumed that the Piramala Kallars are the oldest human inhabitants of the subcontinent. Yet, this is an isolated case found only among the individuals of the Kallar caste. 
The Nayak Period and the Polygars
The downfall of the Mukkulathors occurred in 1345 with the fall of Vira Pandyan IV and the subsequent conquest of Madurai by the Delhi Sultanate. However, the southern territories of the Sultanate soon asserted their independence and the Mukkulathors recovered under the Vijayanagar Empire and later under the Nayak dynasty during whose period they served as Polygars or chieftains. The Nayaks were actually governors appointed by Vijayanagar kings and were Naidus of Telugu origin. Later, after the fall of Vijayanagar, they established some measure of independence in the provinces which they governed and appointed individuals from the warrior Mukkulathor clans as their military chieftains and governors. After a century of peace and prosperity, the Nayak kingdom disintegrated and regional Polygar chieftains most of whom were from the Mukkulathor communities, making use of this opportunity, established their dominance and rule in the areas which they governed. However, just as their sun was in its ascendancy there arose a serious obstacle in the form of the British East India Company who desired to force the Polygars into submission and annex their territories to the Madras Presidency. 
Freedom Fighters and the Polygar Wars
There was a clash of interests between Mukkulathor Polygar chieftains seeking to recover their lands after 400 years of foreign rule and the British East India Company, an emerging power seeking to expand its influence and power into new territories and to arrest the growth of French influence in India ahead of the Seven Years War. The first direct challenge was thrown by Puli Thevan in 1755. This was precipitated by the support the British East India Company lent to Puli Thevar's enemy, the Nawab of Arcot. Puli Thevar is remembered as the first king to have fought and defeated the British in India. His exploits have since become legendary. Resistance to British rule was also offered by Padal Vellaiya Devan who fought the British along with Kattabomman. His son Desakaval Senbaga Devar is also remembered for his exploits. Queen Velu Nachiyar, Queen ofSivaganga, is another noted personality who fought with the British during early British Era. The Maruthu Pandiyar brothers are notable for their role in the Polygar Wars. They were eventually captured by the British and hanged in 1801. 
SurnamesThe surnames used by the Thevar people are Ambalakarar, Servai, Vandaiyar, Thalaivar, Nattaar (not Nadar), etc. Women use the title Nachiyaar and it is a general practice in Southern Tamil Nadhu to address a Thevar woman as "Nachchiyaar". The Kallars of Trichy, Thanjavur, Pudukottai and Ramnad Districts have very distinct surnames. Some of the most common names are Alathondamar, Aarsuthiyar,Kaadavaraayar, Kalingarayar, Vandaiyaar, Thanjaraayar, Chozhangaraayar, Kandiyar, Pursaar, Vaanavaraayar, Mazhavaraayar, Pallavaraayar,Ponnapoondar,Pullavaraayar, Servai, Karaimeendar,Vanavarayar,Vairayar,Ponpethiar,Gopalar, Thevar, Kandapillai, Vayaadiyar, Vanniar, Nattar, Alankara Priyar, Munaiyatriyar, Saaluvar, Manraayar,Kaadavaraayar, Madhavarayar, Onthiriyar, Serumadar, Vambaliar, Thenkondaar, Mankondaar, Kaaduvetiyaar, Sozhagar, Chozanga Nattar etc. There are over 700 surnames in use. There is a group of Agamudayars in Northern Tamil Nadhu (Thiruvannamalai, Vellor, Arani, Arcot).They migrated from Madurai in 17th century. They have other surnames like Udayar,Mudhaliyar, Arcot Mudhaliyar[1] and Thuluva Vellalar. Not That much Marriages happen between people with the same surname. 
Religion
They are traditionally Hindus although some have become Christians. Today they constitute a significant part of the Tamil community in India, Sri Lanka, and in other parts of the world.