Surname มโนทัย (มโนทัย 
, Manotai 
) , worldwide, is a rare cognomen. The cognomen มโนทัย is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Likewise, มโนทัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| มโนทัย | Thailand |
| Manotai | Malaysia, India, Thailand |