Bogar or Bhogar or Boganathar was a legendary South Indian siddhar (herbal healer) or alchemist. He was said to have been born into a goldsmithing family, and to have had miraculous powers. He is also associated with Mahavatar Babaji in some New Age circles. He was considered to be the foremost disciple of Kalanginathar, a siddha who was a disciple to Tirumular.
It is believed that Kalanginathar was the backbone to Bogar's success in his spiritual journey. They both were considered as an epitome for a master disciple relationship. On his master's order he traveled extensively in China to spread his philosophy. He is said to have traveled widely and to have lived for centuries. Bhogar is said to have made the statue of Lord Murugan at Palani by himself using Navabhasanam, made of a combination of rare & extensively medicinal herbs. His jeeva samadhi is also found in the South West corridor at the Palani Murugan temple.