Not much is known of Theudemeres. According to Gregory of Tours a war broke out between the Franks and the Romans some unknown time after the fall of the usurping Emperor Jovinus (411-413) who had been supported by the Franks. Around 422, a Roman army entered Gaul. King Theudemeres and his mother Ascyla were executed by the sword. Theudemeres' reign is supposed to be before that of king Chlodio, and the Chronicle of Fredegar makes Chlodio his son.
Theudemeres must have been a cousin of Arbogastes.