Pandiyan Meru Varamban - Parameswara Pandiyan

In the clan of NilamtharuThiruvir Pandiyan came Parameswara Pandiyan or Meruvaramban (16700 BCE). In his times there was a recorded deluge in Indian Ocean. Many regions were entirely submerged. The Hoons who controlled some submerged territories left Kumari kandam region and came to modern day tamilnadu. They controlled Tamilnadu for sometime. Tharagan (II) had 3 sons - Tharakakshan, Kamalakshan and Vidyunmali. They had 3 Metal Fortifications ( Gold, Silver and Iron ) and vimanas for travel as per mythology. Parameswara Pandiyan was ruling only a portion of himalayan territory when many kings requested him to create a massive army against the 3 brothers. Parmeswara pandiyan killed the 3 brothers in a war and lit the 3 fortifications to ashes (Thripurandakan). This happened in Thiruvathigai near Kadalur. He then went to Kumari kandam, resided in Mahendra Malai of Ezhukundra Naadu. He ruled the entire Indian/Hindu land from Himalayas to Kumari Kandam. With him came Sage Agastya and 8000 Brahmins as clans and Agasthya created a sangam for tamil literature and sciences. Four Vedas originally in Tamil were taught with 9 Agamas, 6 Angas, 18 Rule books. Tamil grammar was written in the name of Mahesa sootram. Poetic verses on human life ( Ainthinai, Agaviyal and Kalaviyal) were also written and taught. In Veeramahendrapuram, a training school was created which taught books as pictorial, verbal and written notations.

Mountain Ranges:

1) Western Mountain Ranges

2) Meru or Mani malai

3) Mahendra Malai

4) Hema Koodam

5) Udaya Giri

6) Syamam or Karu Malai

7) Ambha Giri

Rivers:

1) Pahruli or Kabasthi

2) Kumari

3) Kanni

4) Ikshu Thenugai or Karumbaru 

5) Kanini

6) Venugai

7) Sukumari

Kingdoms or States:

1) Peruvala Kingdoms - Ezhu (7) Thenga Naadu

2) Peruvala Kingdoms - Ezhu (7) Gunakarai Naadu

3) Kumari Kingdoms - Ezhu (7) Thenga Naadu

4) Kumari Kingdoms - Ezhu (7) Kurumpanai Naadu

5) Oli Kingdoms - Ezhu (7) Pinpalai Naadu

6) Oli Kingdoms - Ezhu (7) Munpalai Naadu

7) Oli Kingdoms - Ezhu (7) Kundra Naadu

In Indian history, we referred to our (Bharatha) adjacent continents as 

1) Jambu ( nearest as we see Jambu trees in many southern tropical areas still)

2) Saka

3) Plaksha

4) Sanmali

5) Kusa

6) Krouncha

7) Pushkara 

And deluges created multiple rifts between us and our neighbouring regions.

Tamilian were in 3 clans primarily.

1) Sei-ra - Serar - Sons of Ra  - Agni Clans

2) So-la - Sozha or Sozhiya - Surya Clans 

3) Pandiyar - Sons of Pandu - Chandra or Light pink coloured or Bright or Light or Oli Clans

Major Pandiyan sub clans - Kumari serpan, Thennavan ( Vembu garlanded vazhuthi kings), Vaigai bed based Marans, Pothiya verpan Sadaiyan (pothigai based long haired), Panchavar Kon Meenavan (Five brothers Fishermen kings). Others - Kouriyan, Kaithavan, Chezhiyan, Madurai based Senan

Major Chozha sub clans - Neri verpan ( Vindhya based clans ), Arin Maalaiyan (Athi garlanded), Senniyan ( Long or handsome necked ), Killiyan, Valavan

Major Chera sub clans - Udiyan, Poraiyan, Ponthin Tharon ( Palm garlanded), Villavan ( Bowed), Kaari (Hill clan) Others - Kudavan, Kothai, Vanavaramban, Vanchi vendan, Athiyamaan ( Athi garlanded clan), Malaiyamaan, Porunaiyatron ( Clan of Porunai river )

Pothini or Pothigai mountains had the main tamizh school of Sage Agasthya.