 Romanian historian Florin Curta emphasises the similarity of Isbul's role to that of 8th-century Mayors of the Palace in the Frankish lands under the Merovingian dynasty.Isbul Point on Livingston Island of the South Shetland Islands, Antarctica, was named in honour of "kavhan" Isbul by the Antarctic Place-names Commission of Bulgaria.Isbul also features as a character in Aleksandar Raychev's opera "Khan Asparuh", which debuted at the Ruse Opera House in 1981.