| Father: | Late Dr. S. Nagalingeswaran, | B.A., M.B.B.S. |
| Mother: | Mrs. Janaki Nagalingeswaran | Nagercoil |
| Brothers: | ||
| 1. Dr.N.Ananthasamy, M.S., MCh | Plastic Surgeon | Chennai |
| 2. Mr. N. Punithasamy, M.A. | Business , Entrepreneur | Nagercoil |
| 3. Dr.N.Kumarasamy, M.B.B.S., FRCP (UK), PhD | Chief & Director , VHS -Infectious Diseases Medical Centre | www.cartcrs.org, Chennai |
| Wife: | ||
| Mrs. Nivitha Ahilasamy,M.A. ( Mass Com). | Journalist | Chennai |
| Sons : | ||
| 1. Abnik Ahilasamy | 2. Arnav Ahilasamy. | Chennai |