Family name Ishantha (Ishantha 
) , across the world, is a rare cognomen. The surname Ishantha is habitual in Sri Lanka, where it is quite a rare surname, and the United Kingdom, where it is an extremely rare surname. Likewise, Ishantha is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ishantha | Australia, United States, India, United Kingdom, Sri Lanka |