Surname Thannu (Thannu 
) , worldwide, is a rare cognomen. The family name Thannu is habitual in Myanmar, where it is a rare surname, Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. More frequently, Thannu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thannu | Malaysia, India, Myanmar, Thailand |