Dulibians (Duliby). An East Slavic tribe or alliance of tribes that, according to Rus’ chronicles, inhabited western Volhynia. In the mid-7th century the Dulibians were crushed by the Avars. According to the Primary Chronicle, they took part in Prince Oleh's campaign against Constantinople in 911. In the 10th century the alliance probably disintegrated, and the tribes, bearing the names Volhynians and Buzhanians, came under Kyivan Rus’.