Rāmānuja, was a disciple of Śrī Yāmunācarya. Śrī Yāmunācarya, composer of texts such as the Gītārtha Saṃgraha, Siddhi Traya and Stotra Ratna, was the grandson of the 9th century sage Śrī Nāthamuni and a forebear of T Krishnamacharya.
Krishnamacharya’s personal devotional philosophy and practices were grounded in the teachings that arose from these great sages and evolved into what became known as Viśiṣṭādvaita or qualified non-dualism (One of the three primary schools of Vedānta).
“Rāmānuja agrees with the Advaitin that the scripture teaches the non-twoness (Advaita) of reality.
But, he denies the Advaitan’s conclusion that this oneness is attributeless, pure being or consciousness and that plurality with regard to soul and material world is falsely imposed on this one Being due to ignorance.”
Rāmānuja on the Yoga – Dr. Robert C Lester 1976.