Swami Brahmananda Saraswati (20 December 1868 – 20 May 1953) also known as Guru Dev, was the Shankaracharya of the Jyotir Math monastery in India. Born into a Brahmin family he left home at the age of nine in search of a spiritual master. At age fourteen he became a disciple of Swami Krishnananda Saraswati. At the age of 34 he was initiated into the order of "Sanyas" and became the Shankaracharya of Jyotir Math in 1941 at age 70. His disciples included Swami Shantanand Saraswati, Transcendental

Meditation founder Maharishi Mahesh Yogi, Swami Swarupananda Saraswati and Swami Karpatri. Five months before his death in 1953, he made a will naming his disciple, Swami Shantanand Saraswati as his successor.