In all the world, จัสติน (Justin 
, Jastin 
, Castin 
) is a widespread male forename. The given name จัสติน is characteristic of the United States, where it is a common male name, Cameroon, where it is quite a common male name, and New Zealand (explore the name in all countries). In absolute terms, it is the most numerous in the United States, the Democratic Republic of the Congo, and Tanzania. Very seldom, จัสติน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Justin | Myanmar, Tanzania, United States, Cameroon, Democratic Republic of the Congo |
| Jastin | Myanmar, Tanzania, United States, Democratic Republic of the Congo, India |
| Castin | South Africa, Canada, United States, Democratic Republic of the Congo, India |
| จัสติน | Thailand |
จัสติน is also a prevalent name for the fictitious and mythical characters: Justin Taylor , the fictional character from Queer as Folk; Shining Knight , the fictional character from DC Comics, Stargirl; Libra , the comics character; Justin Finch-Fletchley , character in Harry Potter and the Chamber of Secrets and Justin Russo , the Fictional character on TV sitcom Wizards of Waverly Place, portrayed by David Henrie, Wizards of Waverly Place: The Movie, and in many other works.