Last name วัจนะ (Word 
, วัจนะ 
, Watna 
) , all around the world, is quite a common cognomen. The family name วัจนะ is characteristic of Myanmar, where it is quite a rare surname, Ghana, and the United States. In absolute terms, this name is the most popular in the United States, Myanmar, and Indonesia. Much less frequently, วัจนะ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Word | Myanmar, Egypt, United States, Ghana, Indonesia |
| วัจนะ | Thailand |
| Watna | Thailand, Brazil, United States, India, Indonesia |