Around the world, ฤทธิมาศ (ฤทธิมาศ 
, Rithimat, Ritthimat ) is an extremely rare unknown gender first name. Much more prevalently, ฤทธิมาศ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ritthimat, Ritthamart, ฤทธิมาศ | Thailand |
Ritthamas, and Tharuetimat