This is a list of Bulgarian regents, a regent, from the Latin regens "one who reigns", is a person selected to act as head of state (ruling or not) because the ruler is a minor, not present, or debilitated.
Kavhan Isbul is regent after the death of Khan Omurtag, when his successor Khan Malamir is still minor.
Kavhan Isbul is regent of Presiyan - the minor nephew of Malamir.
On behalf of the infant king (1241-1246) Colloman I Assen, the country was ruled by a regency.
1246 - 1253 - Regency Council headed by Irina Komnina
IVAN IV SMILETS - Regency council headed by his mother Smiltsena and despot Eltimir
Stefan Stambolov, Sava Mutkurov and Petko Karavelov (replaced by Georgi Zhivkov) are regents after the abdication of Prince Alexander Battenberg until the election and inauguration of the new Prince Ferdinand Sakskoburggotski.