The Lemuria Continent Kumari Kandam is believed to be the connections between Africa to South India, through Madagascar

Ancient Tamil Kingdom 

Many of the earliest extant Tamil literary works and their commentaries, mentions a Tamil continent called Kumari Kandam, which was ruled by Pandiyan Kings for 9,990 years, before getting submerged in the Indian Ocean, south of present-day Kanyakumari district at the southern tip of India.

The 7th century CE commentary written by Nakkīranār for the Tamil literary work Iraiyanar Akapporul, gives the list of Pandiyan kings who ruled the Kumari Kandam. 

It also gives information about the three Tamil Sangams(assemblies of Tamil scholars and poets who do research on Tamil language and also creates literary works) which spans about 9,990 years. 

 

According to this commentary, out of three Tamil Sangams, first two happened in Kumari Kandam.

Also, according to this commentary :

The First Sangam (Mutaṟcaṅkam) is described as having been held at the Pandiyan King’s capital city, Madurai(KadalKonda ThenMadurai – which means Southern Madurai which was submerged in the sea. 

The old Madurai was called as Southern Madurai to differentiate it with the capital city of Madurai of third Sangam), which lasted a total of 4440 years, and had 549 members, which supposedly included some gods of the Hindu pantheon such as Siva, Kubera and Murugan. 

A total of 4449 poets are described as having composed songs for this Sangam. There were 89 Pandiya kings starting from Kaysina valudi to Kadungon were decedents and rulers of that period.

If credence is given to this commentary, then the beginning of first Sangam should be placed somewhere in 9000 B.C.

Most of the lands of Kumari Kandam were submerged in the sea during first devouring of the land by the sea. 

Then, the Pandiyan King and the remaining people migrated to the remaining land of Kumari Kandam and the king moved his capital to Kapatapuram. At the same time, the present location of Tamil Nadu was ruled by Chera, Chola, and 46 other small kingdoms.

The Second Sangam (Irandaam Caṅkam, Iṭaicaṅkam) was convened in Kapatapuram, the then capital city of Pandiyan King. This Sangam lasted for 3700 years and had 59 members, with 3700 poets participating. 

There were 59 Pandiya kings starting from Vendercceliyan to Mudattirumaran were decedents and rulers of that period.

This city was also submerged in sea. Ramayana and Arthasastra of Kautalya corroborates the existence of a city named kavatapuram. 

There is a reference to a south Indian place called kavata by sugriva in a verse which runs something like ‘having reached Kavata suitable for Pandiya‘. The place kavata is also mentioned by Kautalya in Arthasastra.

Having lost the complete Kumari Kandam, the Pandiyan King conquered the part of lands belonging to the Chola and Chera kings(Silapathikaram, Maturaikkandam, verses 17-22) and made Korkai, a seaport on the southernmost tip of the Indian Peninsula, as his capital and in later times moved his capital to the current city of Madurai.

The Third Sangam (Moondraam Caṅkam, Kaṭaicaṅkam) was purportedly located in the current city of Madurai, the then capital city of Pandiyan King, and lasted for 1850 years. 

There were 49 Pandiya kings starting from Mudattirumaran (who came away from Kabadapuram to present Madurai) to Ukkirapperu valudi were decedents and rulers of that period. 
  

The academy had 49 members, and 449 poets are described as having participated in the Sangam.

https://www.booksfact.com/mysteries/lemuria-continent-kumari-kandam-ancient-tamil-kingdom-facts.html