Kubrat (Greek: Κροβατον, Kούβρατος; Bulgarian: Кубрат [koˈbrat]) was the ruler of the Onogur–Bulgars, credited with establishing the confederation of Old Great Bulgaria in ca.

Upon Attila's death, the tribes that later formed the Bulgars had retreated east into the Black Sea-Caspian Steppe.

As the 7th-century Byzantine historian John of Nikiu narrates: This project is concerned with Kubratos, chief of the Huns [sic], the nephew of Organa, who was baptized in the city of Constantinople, and received into the Christian community in his childhood and had grown up in the imperial palace.

[11] According to Nikephoros I, Kubrat instructed his five sons (Batbayan, Kotrag, Asparukh, two others unmentioned are considered to be Kuber and Alcek[7]) to "never separate their place of dwelling from one another, so that by being in concordance with one another, their power might thrive".

[7][11] The Pereshchepina Treasure was discovered in 1912 by Ukrainian peasants in the vicinity of Poltava, in village Malo Pereshchepyne.

[13][14] It consists of diverse gold and silver objects of total weight of over 50 kg from the migration period, including three rings with monograms, which led scholars to identify the site as Kubrat's grave.

[13] Kubrat is mentioned in the Nominalia of the Bulgarian khans, according which his birth is given the sign of the ox (shegor vechem) in the Bulgar calendar.

[19] Kubrat was portrayed by Vasil Mihaylov in the 1981 Bulgarian movie Aszparuh, directed by Ludmil Staikov.