Ratimir (Latin: Ratimarus) was a duke or prince (knez) of the Slavs in Lower Pannonia between ca. 829 to 838. It is believed that Ratimir descends from a royal dynasty that provided rulers for Moravia and Croatia. 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. Ratimir fled the land, and the Franks instated dukes Pribina and Kocelj to rule Pannonian area in the name of the Franks.