Wikipedia
Praedenecenti was an early medieval Slavic tribe, mentioned only with that name in the Royal Frankish Annals relating to Frankish-Bulgar relations in 822–824. They lived "in Dacia, adjacent to the Danube near the Bulgarian border". In 824, they are mentioned as having been in conflict with the Bulgars. They secretly met the Frankish emperor at Aachen and requested help regarding Bulgar aggression. The Annals problematically states that their name was the common name of the Obodrites, a tribe which lived much further north near the Baltic Sea; some historians believe Obodrites had migrated to the south. According to Pavel Jozef Šafařík and Joachim Lelewel they were the Braničevci (in what is today Serbia). S. Oța believes that they are the same as the Merehani, and put their territory in the Banat. I. Boba connected the tribe with the Merehani, who according to him are south Moravians. Their ethnonym is Slavic.