The settlers came primarily from what is now eastern Bulgaria, but many were also descendants of Bulgarians of the western part of the country that had moved east in and before the 18th century.
Naseljenici su došli prvenstveno s područja što je sada istočna Bugarska, ali mnogi su bili i potomci Bugara iz zapadnog dijela zemlje koji su se preselili u istočnu Bugarsku i prije 18. stoljeća.