Cognomen Shanmugaratnam (Shanmugaratnam 
) , worldwide, is a rare family name. The family name Shanmugaratnam is habitual in Sri Lanka, where it is quite a rare surname, Singapore, where it is a rare surname, and Norway. Measured by absolute frequency, it is commonest in Sri Lanka, Canada, and Singapore. Likewise, Shanmugaratnam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Shanmugaratnam | Australia, Germany, Canada, Singapore, Sri Lanka |
|
tharman shanmugaratnam Singaporean politician and economist, 5th and current Senior Minister of Singapore, SG (b. 1957) |
|
| k. shanmugaratnam (b. 1921) |
|
|
| yohan shanmugaratnam Norwegian journalist, LK (b. 1979) |
|