2024年9月24日 · Possibly an exonym given by the Romans meaning "king of the Boii," as they were seen as a Celto-Germanic tribe; compare Umbri and Insubres. Or, of Germanic origin, from Proto-Germanic *wambō (“womb, stomach, belly”), also preserved in the tribe name Gambrivii. Ambrōnēs m pl (genitive Ambrōnum); third declension. Third-declension noun, plural only.