Iyengar was born into a family whose paternal forebears came from Kumbakonam, in the Cauvery (Kaveri) delta, in Tanjore District, in British India. His eldest brother, Diwan Bahadur
S. Srinivasa Raghavaiyangar, served as the Inspector General of Registration in the
Madras Presidency. Srinivasa Raghavaiyangar, in 1893, wrote
Memorandum of Progress of the Madras Presidency during the last forty years of British administration to refute the charges of economic exploitation made by nationalists. Yet another elder brother, Soundararaja Iyengar, was the father of
Sangeetha Kalanidhi awardee
T. Brinda, and he was Deputy Collector in Madras and
Kumbhakonam, and was associated with
Madras Music Academy. The Music Academy confers an award in the memory of Kasturi Ranga Iyengar. == Early life ==