Rajna's father Dr. P. K. Swaminathan, disciple of Maestro Umayalpuram K. Sivaraman, is a mrudangam artist with over 30 years experience accompanying musicians & dancers. He is a scientist by profession.
Rajna's mother Lalitha Swaminathan, is a vocalist, Nattuvangam artist and a Bharathanatyam dancer. She has been providing vocal and nattuvangam for dance performances for the past 25 years. She is a software systems engineer by profession.
Rajna's sister, Anjna Swaminathan is a violinist trained by Parur Sri M. S. Gopalakrishnan & Mysore Sri H. K. Narasimhamurthy. She gives solo concerts and provides accompaniment for musicians & dancers. Watch and listen to Anjna's solo with Rajna on Mrudangam: