Globally, Kostyakov (Иван 
, Kostyakov 
, Костяков 
) is a prevalent boy's forename. The first name Kostyakov is habitual in Bulgaria, where it is a prevalent boy's name, Kazakhstan, where it is a widespread male name, and Russia (explore the name in all countries). Much less frequently, Kostyakov is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Иван | Kazakhstan, Russia, Belarus, Moldova, Bulgaria |
| Kostyakov | Russia, Israel |
| Костяков | Azerbaijan, Kazakhstan, Russia, Belarus, Ukraine |
Kostyakov is also a prevalent name for the fictitious and mythical characters: Ivan Orav , the ultra-patriotic fictional character created by Andrus Kivirähk, Ivan Orava mälestused; Ivan Vanko , the fictional character from 2010 film 'Iron Man 2'; Ivan Karamazov , the fictional character in novel The Brothers Karamazov by Fyodor Dostoyevsky; Ivan Drago , the fictional Russian boxer from the film Rocky IV and Ivan Steranko , the fictional character in the 2012–2017 animated Teenage Mutant Ninja Turtles television series, and in many other works.