Last name ฤทธิโชค (Luck 
, ฤทธิโชค 
, Rittichok ) , around the world, is a common cognomen. The last name ฤทธิโชค is characteristic of Myanmar, where it is quite a rare surname, Mauritius, and Australia. Measured by absolute frequency, the name is most common in the United States, Myanmar, and Germany. Very seldom, ฤทธิโชค is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Luck | Germany, Indonesia, United States, Myanmar, United Kingdom |
| ฤทธิโชค, Ritthichok, Rittichok | Thailand |