The name "Ballomar" can be broken down into two Celtic elements, ballo- meaning "limb, member" (cf. Gaulish ballos Irish ball), and maro meaning "great" (cf. Gaulish maros, Welsh mawr, Irish mór).;;
Ballomar is first mentioned by Cassius Dio as conducting peace talks with the governor of Pannonia Superior, Marcus Jallius Bassus, following the breakthrough of the limes by his allies the Germanic Lombards and Ubii. Ballomar led the great invasion of Italy by a coalition of Celtic and Germanic tribes in 167-70 AD, which was the first time a hostile force had entered Italy since the Cimbri of Boiorix during the Cimbrian War. Ballomar defeated a force of 20,000 Roman soldiers near Carnuntum, destroyed Opitergium (Oderzo) and besieged Aquilea.
Ballomar is a character in the 1964 film The Fall of the Roman Empire.
- Cassius Dio, Historia romana, Books LXXII & LXXIII
- The column of Marcus Aurelius in Rome, which apparently depicts Ballomar
- Evans, D. Ellis (1967). Gaulish personal names: a study of some Continental Celtic formations. Clarendon P. pp. 147–148 & 223–228.
- X., Delamarre (2003). Dictionnaire de la langue gauloise : une approche linguistique du vieux-celtique continental (2e éd. rev. et augm ed.). Paris: Errance. pp. 65 & 218. ISBN 9782877723695. OCLC 354152038.
- Ranko., Matasović (2009). Etymological dictionary of proto-Celtic. Leiden: Brill. pp. 53 & 258. ISBN 9789004173361. OCLC 262430534.