Last name Avadai (Avadai 
) , in the entire world, is a very rare family name. The last name Avadai is habitual in Singapore, where it is a rare surname, Malaysia, and India, where it is an extremely rare surname. Likewise, Avadai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Avadai | India, Malaysia, Singapore |
| avadai raghunatha tondaiman Kallar chieftain |
|
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| avadai dhanam lakshimi First lady of Singapore between 1981 and 1985 |
|