Cognomen Jamadagni (Jamadagni 
) , all around the world, is a rare last name. The surname Jamadagni is characteristic of Japan, where it is a very rare surname, India, and Canada, where it is an extremely rare surname. In absolute terms, this name is the most popular in India, Japan, and the United States. Also, Jamadagni is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jamadagni | Canada, United Kingdom, United States, India, Japan |