hi from czech republic,
i am helping out my friend with searching for his ancestors, but this person seems to be a dead end on his journey.
Petko Petkov Petkov (well i assume from middle name that his fathers given name was Petko as well)
*16,8,1929, Dobri Dol, Bulgaria well according to google there are at least 3 willage of the same name in that country.

but anyway to my point, anybody here have any idea where i can search myself (preferably online) or where my friend can get someone else to look for information?

thx for any advice& help