Surname Бротко (Bortko 
, Бротко 
) , in all the world, is a rare last name. The family name Бротко is habitual in Lithuania, where it is a rare surname, Poland, and New Zealand, where it is a very rare surname. In absolute terms, it is the most numerous in the United States, Poland, and Russia. Very seldom, Бротко is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bortko | Russia, Colombia, United States, Poland, Lithuania |
| Бротко | Russia, Ukraine |