Isbul (Bulgarian: Исбул) (fl. 820s–830s) was the kavhan, or first minister, of the First Bulgarian Empire during the reigns of Omurtag, Malamir and Presian...

Isbul Point (Bulgarian: нос Исбул, ‘Nos Isbul’ \'nos is-'bul\) is a narrow rocky point projecting 600 m from the coast of Ray Promontory into Svishtov...