• He is considered as the Father of Tamil Literature.  He compiled first Tamil grammer called Agathiyam. 
• It is believed that he has lived in the 6th or 7th Century BC.  He is direct dispels of Lord Siva.
• Specialized in language, alchemy, medicine, meditation & spirituality (yogam & gnanam).
• 96 books in the name of Agathiyar – Vaidiya Sigamani, Chendhooram - 300, Mani-400, Sivajalam, Sakthijalam etc.
• Still it is believed that the healings spirit of Agathiya hovers in the mountains of the Courtalam is the southern end of Tamil Nadu.

• The Prince of Mystics is said to be the disciple of Nandhidevar.

• His age is fixed approximately between 5th and 8th centuries.

• His work Tirumandiram, deals with the body and soul.

• Thirumanthiram is considered as a Bible for Thanthrik Yoga.

 Thirumoolar is considered as the Emperor of Siddha system of medicine who is the prime author for the famous literary works of THIRUMANTHIRAM and SAIVA SIDDHANTAM which framed the basic principles of Siddha system. A hypothesis of Thirumoolar in Atomic theory has been reinstated as Nanotechnology in this decade. His principles on Physiology in Siddha system are astonishing. Thirumoolar is the only Siddha who emphasized more on sound mind in a sound body by which one can achieve the mortality by kalpa yoga procedures. Versions of Thirumoolar are certainly appropriate for this present / modern, stressful world. It is helpful in combating non-communicable diseases such as myocardial infarction, degenerative diseases and depressive disorders. Regular practice of yoga will undoubtedly improve the over-all health and human character for the better.

• His period is ascribed 4th Centuries B.C.  It is believed that he has traveled China and propagated the spiritual philosophy in China. 
• He is considered as the descendant of Thirumoolar.
• He has attained samathi at Palani.
• It is considered that the statue of Lord Muruga was concocted with Nava pasana (Nine arsenical compounds).
• He has contributed on the field of alchemy, medicine and yoga.
• His contribution on the synthesis of mercury, mercurial compounds and arsenical compounds are note worth. 
• More than 42 works on Siddha medicine are found to be available on his name.

• Konganar is considered as the son of Bogar. His period is said to be 4th and 5th centuries B.C.
• He has lived probably in Koganagiri of Kongunadu in Tamil nadu.
• Out of all his works more than 40 deal with the alchemy and the elixir (muppu) of life. 
• He has also contributed more on philosophy, medicine and spiritual practices.

• He is the latest siddhar lived.  His period is fixed between 14th & 15th Centuries.
• He is considered to be the master of all the fields like astrology, mysticism, alchemy, medicine and language.
• The degree of   his scholarship is considered to be the supreme.
• The style of the language is considered as the best as any contemporary Tamil poets.
• He has mastered all the languages like Telugu, Kannada, Malayalam, Tamil, Thulu and Sanskrit. 
• His Guru (Master) was Dharmasowmiyar.
• His work on medicine especially on classification of diseases with their managements and prognosis are highly praise worthy.

Place of birth               : Trikonamalai/ Sathurakirimalai

• Synonyms                  : korakkanathar
• Guru                           : Allama prabu
• Disciple                       : Siddha Nagarjunar
• Contributions              : Korakkar brahma gnanam 1 - Korakkar kalai gnanam 500(endangered) - Korakkar vaippu   (Endangered)  -
                                      Korakkar brahma gnana soothiram
                                      Korakkar  karpa soothiram

• Special notes              : He has specially used kanja (Indian hemp) in his preparations poorana lehyam/chooranam and so that herb is named after him.

• Period            -       11 th century AD
• Synonym        -      karuvur thevar
• Place of birth  -      Karuvur
• Guru               -      Bogar/ Kamalamuni
• Disciple           -     Edaikkadar
• Contributions  -     Karuvurar vadha kaviyam Karuvurar siva gnana bodhakam Thiru isaippa
• Samadhi       -      Karuvur
• Special notes -    His contribution in construction of Tanjore temple is enormous. There is a special siddhar sannidhi for him even now at Tanjore big temple

• Period            -       11 th and 12 th century AD
• Synonym        -      Edaikkadu siddhar
• Place of birth  -      Thiruedaikkodu
• Guru               -     Karuvurar/ Bogar/Navanatha siddhars
• Disciple           -   Alukanneesar /kudhambai/kaduveli
• Samadhi       -       Thiruedaikkodu
• Special notes-His contribution towards Rasavatham/Kayakalpam is remarkable     

• Period            -      11th  century AD
• Synonym        -     Kamblichattamuni/kailasa chattamuni/sattanadar
• Place of birth  -     An srilankan nationality is assumed
• Guru               -     Dakshinamoorthy/ Nandhi
• Disciple           -    Sundarandhar

• Contributions    -     Satta muni pin gnanam 100

                                        Sattamuni vadha kaviyam 1000
                                        Sattamuni vatha soothiram 200
                                        Sattamini gnana vilakkam 51
                                         Thiru isaippa

• Samadhi       -      Srirangam or Sirkali
• Special notes-     His contribution as guru for Alchemy is noteworthy.

 He took kalpam to change the body thathuvas and by which he     evolved 96 thathuvas.

• Period            -       11th  century AD
• Synonym        -      Sorupamendra siddhu
• Place of birth  -      Mahendra hills/Podhigai hills
• Guru               -      Chattamuni
• Disciple           -     Tamarakar
• Contributions  -      Sundaranandar siva yoga  gnanam 32  
• Sundaranadar vakkya sutram 64                                                         

• Samadhi         -       Kudal/Thiruvarur/Varaka kundram
• Special notes  -       His expertise in preparation of chunnam is of great astonishment

• Period            -      6-8 century AD
• Synonym        -      Yacob
• Place of birth  -      Mahendra hills/Podhigai hills
• Guru               -      Pulathiyar
• Disciple           -     Tamarakar

• Contribution    -     Rama devar 1000                                            

• Samadhi         -     Alagar malai
• Special notes  -     His contribution in conversion of Sthula sariram into sukkuma Sariram and devlpment of kayakalpa as art and science was Initiated by Ramadevar

• Period            -     11th  century AD
• Synonym        -    No references 
• Place of birth  -    Marutha malai in kongunadu
• Guru               -    Chattamuni
• Contributions  -    All the versions related with gnana siddhi starting with Aadu Pambe       
• Samadhi       -           sankaran koli
• Special notes     -   Atta maa siddhis of siddhars are mentioned by him

Period            -      11th century AD

• Synonym        -      Nondi siddhar
• Place of birth  -      Machai desam in pandya kingdom
• Guru               -      Kakapusundar/agasthiyar/pinnakkesar
• Disciple           -     Sundarandhar
• Contributions  -     Machendra nadhar endra nondi siddhar padal
• Samadhi          -    Thiruparankundram/Thiruvanaikkavu
• Special notes   -    He is called as samayathitta siddhar as he retained Sivabakthi

Period            -      11 th century AD

• Place of birth  -      Mayavaram
• Guru               -      Alukaneesar

• Contributions  -     Kudambai siddhar padalkal on  philosophy of Siddhars
• Samadhi        -      Mayavaram
• Special notes-       His works are more towards spirtiual bliss and gnanayoga

• Period            -       11 th and 12 thcentury AD
• Synonym        -       Azhugai siddhar
• Place of birth  -       Vaira giri
• Guru               -       Edaikkadar
• Contributions  -      Siddhar gnanakovai
• Samadhi         -      Nagapattinam
• Special notes  -     All his poems are pathetically melodious adressing the lady

Period            -       11 th century AD

• Synonym        -     No references 
• Place of birth  -      Marutha malai in kongunadu
• Guru               -      korakkar
• Contributions  -     All the versions related with Gnana siddhi starting with Devil mind-Endangered                        
• Samadhi         -     Thiruvalankadu
• Special notes -      He is different from other siddhars mentioning search inside for peace instead of yoga

• Period            -     11th  century AD
• Synonym       -      No references 
• Place of birth -      Marutha malai in kongunadu
• Guru              -      Lord Siva
• Disciples        -     Thirumoolar/Romarishi/Dakshinamoorthy
• Contributions -     Nandhi kalai gnanam 1000
• Samadhi        -     Sri sailam at kalahasthi
• Special notes -     GURU OF GURUS

• Period            -       11th  century AD
• Synonym        -       Pusundar
• Place of birth  -       Vadasalai
• Guru               -       Agasthiyar
• Disciple           -      Romarishi / Vasinathar
• Contributions  -      Pusundar mei gnana vilakkam-80/pusundar gnanam-19        
• Samadhi         -      Kailaya padayam /Nagamalai nadu vattaram
• Special notes -      He is expertise Thailatham,Anjanam,Vaidyam,&Vatham