B. R. Rajam Iyer (or Aiyar) 1872–1898) was an Indian lawyer and writer who wrote in Tamil and English. He is the author of Kamalambal Saritharam, an early Tamil novel.
Iyer was deeply interested in religion and philosophy and edited an English magazine Prabuddha Bharata which was started at the behest of Swami Vivekananda. He authored Kamalambal Saritharam between 1893 and 1895. Kamalambal is one of the earliest Tamil novels written after Prathapa Mudaliar Charithram.