Nomenclature Second_Bulgarian_Empire

the name used empire contemporaries bulgaria, state called itself. during kaloyan s reign, state known being of both bulgarians , vlachs. pope innocent iii , other foreigners such latin emperor henry mentioned state bulgaria , bulgarian empire in official letters.

in modern historiography, state called second bulgarian empire, second bulgarian tsardom, or second bulgarian kingdom distinguish first bulgarian empire. alternative name used in connection pre-mid 13th century period empire of vlachs , bulgars; variant names include vlach–bulgarian empire, bulgarian–wallachian empire, or romanian–bulgarian empire; latter name used exclusively in romanian historiography.

however, arabic chronicles 13th century had used name of wallachia instead of bulgaria , gave arabic coordinates of wallachia , specified walachia named al-awalak , dwellers ulaqut or ulagh