The following information is available about Sri Kamalamuni in the book " Bogar 7000 " written by siddhar Bogar.

Song 5729: Kamalamuni was born on the Tamil month of Vaikasi (May - June), his birth star being 2nd part of Poosam.

Song 5725: The siddhar named Kamalamuni belongs to Kuravar caste. He lived for six-eight generations.

Song 5841: Kamalamuni is 4000 years and some 300 odd (days) old. He lived in China for a long time.

However, siddhar Karuvoorar in his book " Vadha Kaviyam " (Song 584) says "Maamuni" belongs to " Kannar " caste. He does not explicitly say "Kamalamuni", but mentions "Maamuni". The author of this article does not understand whether Karuvoorar refers to Kamalamuni or not.

Sri Kalangi Nadhar belongs to Kannar caste. Many people believe that Sri Kalangi Nathar is siddhar Kamalamuni. In the 63 rd song of " Kamalamuni Suthiram 76 ", a line says that " Kamalamuni alias Kalangi ". Hence it can me true that Sri Kalangi Nathar is siddhar Kamalamuni himself.

In " Bogar Janana Sasthra ", it is mentioned that Kamalamuni attained samadhi at Madurai . I t is belived that siddhar Kamalamuni attained samadhi at Thiruvavur.

source:http://siddhas.org/html/kamalamuni.html

Kalangi Nathar was the guru of Bhogar (or Bhogarnathar). Kalangi Nathar was from Benaras. He was also referred to the great confucious of china who was the back bone of the chinese civilisation.

Kalangi Nathar and bogar were considered to possess an ideal master and student relationship. It is said that they had a mutual care among both of them in their own spiritual progresses. Kalangi nathar, especially took more care and strain towards the spiritual advancement of his disciple bogar. Kalangi nathar was behind bogar's every development and his innovations for the world.

He is often referred to us kanjamalai siddhar. The word "kanjam" stands for the following meaning - gold, copper and Iron and malai means hill. It is said that paranthaka chozha who built sri nataraja temple with golden roof, took the gold from this hill. Also the water falls seen in this hill is called "ponni nadhi".

He is the disciple to the great siddha Thirumoolar. He is one among the seven disciples whom thirumoolar transcended his knowledge. The other six being -Indran, Soman, Rudhran, Kanduru,Brahman and kanjamalaiyan.

The shrine of Kalangi Nathar is found in a small village in Salem, Tamil Nadu. This village is 12 km away from salem city. This place is in via route to Ilampillai.

He is supposed to have been attained jeeva samadhi in this place several hundred years ago.

Kalanginathar is Boghar's father according to Boghar's poem. Boghar gloring kalanginathar in many of his verses.

Main Source: Gavanagar Muzhakkam Magazine
surce: http://siddhasofindia.blogspot.com/

Kalangi Nathar Pallikaranai Temple

He was the guru of Bogar. He has stayed, always, either in 'CHATURA GIRI' or in 'PODHIGAI' hills. Siddhas normally strive very hard for many years to get an indestructible body by taking herbs and special potions. Whereas Kalangi Nathar, proved, that with the 'JYOTI VRUKSHA' one can attain such a body in one single day. He could control wild animals with mantras. A calm person who never exposed himself unnecessarily. His talks had the Vasikara Sakti (Power of enslaving). With his blessing one can become a great orator.

source: http://omgaarasakthi.org/kalanginathar.htm