Gangadhara Vajapeyi/ Gangadhara Vajapeyin /Gaṅgādhara Vājapeyayāi also known by names Gangadhara Adhvarin and Gangadhara Suri was a great vedic scholar of the Krishna Yajurveda from Thiruvalangadu in Thanjavur district of Tamil Nadu. He was son of Bhatt Shri Deva Nrisimha Bhatta and Sumati, whose ancestors were connected with Appayya. Gangadhara was a disciple of Visvarupa. He was a Smarta brahmin belonging to the Vadhula gotra.
He was an expert in Nyaya and Taraka Shastra. He was one of the eight jewels at the court of Maratha king Serfoji I of Tanjore. He had performed the Vajapeya yagna, which was presided by the Maratha King Serfoji and such given title of Vajapeyi.
Most importantly, he is remembered as the Guru of Bhaskararaya – one of the greatest shrauta scholar and exponent of the tantra of recent times. Bhaskararaya acquired knowledge of the Nyaya sastra and Tarka sastra from Gangadhara Vajapeyin. Bhaskararaya was one of the foremost authority Shri Vidya, which he learned from Gandahara Vajapeyi . Bhaskararaya's commentary on the Lalita sahasranama (bhashya) and his commentary on the Shri Vidya mantra and worship are most well known.