I believe he's not Petrov but Petro after all (out of options listed in the article)
You are unlikely to have no first name and two last names, and Zailenko looks like a last name, so the other one is likely a first name, which would be Petro.
Of course there is always a chance that he is Petrov-Zailenko.
You are unlikely to have no first name and two last names, and Zailenko looks like a last name, so the other one is likely a first name, which would be Petro.
Of course there is always a chance that he is Petrov-Zailenko.