Ratimir (Latin: Ratimarus)[a] was a duke or prince (knez) of the Slavs in Lower Pannonia[1] between ca.

[citation needed] In 827, the Bulgars under Great Khan Omurtag invaded and conquered Lower Pannonia and parts of Frankish territories to the north.

His province is believed to have been the territory of the former Roman Pannonia Savia,[3] which is located in modern-day Croatia.

[4] In 838, nine years later, following the Bulgarian conquest of Macedonia, the Danubian count Radbod, prefect of the East March, deposed Ratimir and restored Frankish rule.

[5] According to the South Slavic Chronicle of the Priest of Duklja, rejected by historians, one of Ratimir's descendants was Svatopluk.