Quote:
Titus Livius, Ab urbe condita
Book 5, chapter 33
[1] de transitu in Italiam Gallorum haec accepimus: Prisco Tarquinio Romae regnante, Celtarum quae pars Galliae tertia est penes Bituriges summa imperii fuit; ii regem Celtico dabant. [2] Ambigatus is fuit, uirtute fortunaque cum sua, tum publica praepollens, quod in imperio eius Gallia adeo frugum hominumque fertilis fuit ut abundans multitudo uix regi uideretur posse. [3] hic magno natu ipse iam exonerare praegrauante turba regnum cupiens, Bellouesum ac Segouesum sororis filios impigros iuuenes missurum se esse in quas di dedissent auguriis sedes ostendit; [4] quantum ipsi uellent numerum hominum excirent ne qua gens arcere aduenientes posset. tum Segoueso sortibus dati Hercynei saltus; Belloueso haud paulo laetiorem in Italiam uiam di dabant. [5] is quod eius ex populis abundabat, Bituriges, Aruernos, Senones, Haeduos, Ambarros, Carnutes, Aulercos exciuit. profectus ingentibus peditum equitumque copiis in Tricastinos uenit.
My Rendering
[1] Of Gaul’s passage into Italy this [account] is reliable. When Tarquinius Priscus was king of Rome, in Gaul a third of Celtae was possessed by the Bituriges who held supreme authority as they furnished kings for the Celts. [2] One such was Ambigatos of whom vigor and fortune followed, as at this time his nation surpassed all others in power. During his reign the domain of the Gauls was fruitful, and as human-kind’s fertility became evident he sensed difficulty in ruling such a huge multitude. [3] When in old age, he decided to free his realm of this turbulence, so he instructed his sister’s sons, Bellouesos and Segouesos, to observe the omens and determine what the gods reveal, [4] and to rouse as great a number of those that wished to assure their arrival that no nation could block their advance. When Segouesos drew, his lot was the Hercynian forest, while Bellouesos was more than pleased, as the gods gave him the road to Italy. [5] He stirred up the excess population of the Bituriges, Averni, Senones, Aedui, Ambarri, Carnutes, and Aulerci. Starting out this vast body of foot and horse came onto the Tricastini.
Roberts
About the passage of the Gauls into Italy we have received the following account. Whilst Tarquinius Priscus was king of Rome, the supreme power amongst the Celts, who formed a third part of the whole of Gaul, was in the hands of the Bituriges; they used to furnish the king for the whole Celtic race. Ambigatus was king at that time, a man eminent for his own personal courage and prosperity as much as for those of his dominions. During his sway the harvests were so abundant and the population increased so rapidly in Gaul that the government of such vast numbers seemed almost impossible. He was now an old man, and anxious to relieve his realm from the burden of over-population. With this view he signified his intention of sending his sister's sons Bellovesus and Segovesus, both enterprising young men, to settle in whatever locality the gods should by augury assign to them. They were to invite as many as wished to accompany them, sufficient to prevent any nation from repelling their approach. When the auspices were taken, the Hercynian forest was assigned to Segovesus; to Bellovesus the gods gave the far pleasanter way into Italy. He invited the surplus population of six tribes--the Bituriges, the Averni, the Senones, the Aedui, the Ambarri, the Carnutes, and the Aulerci. Starting with an enormous force of horse and foot, he came to the Tricastini.
Livy tells us that between 616 and 578 BC large groups of Bituriges, together with groups from several other Gaulish tribes migrated to northern Italy. The leader of this group, which was listed in detail, was called Bellovesus. At the same time Livy says a second large group, who's composition was not listed, migrated into southern Germania. The leader of the second group was called Segovesus. Based on the list of tribes the point of departure for the first group appears to have been eastern and southeastern central France. Livy's account never actually states from where the second migration originated, he just points out that the leader of the second group was a brother of the leader of the first group. Livy also stated that at this time Bituriges furnished kings for other Celtic tribes. So Livy’s account seems to supplement Caesar’s story, and may suggest the second group was the Volcae led by a Biturigian king named Segovesus, that migrated into southern Germania near the end of 7th or beginning of the 6th century BC, from the upper Danube.