Phra Ajahn Thate Desaransi (1902โ1994), also known as Ajahn Tate, Luangpu Thet Thetrangsi, Phra Desarangsee, or by his monastic title Phra Rajanirodharangsee, was a famous meditation master and Buddhist monk from northern Thailand. He was a disciple of Ajahn Mun and thus a first generation student of the Thai Forest Tradition and one of the founding teachers of the lineage. Following the death of Ajahn Mun in 1949, he was considered to be the Ajahn Yai, or the head of the Thai Forest Tradition lineage until his death in 1994.