On Phoenician Letters

Strabo, Pliny, Diodorus, Eustathius.

The Gauls, firstborn sons of the world.

9. The Cimbri, who the adversaries of Gaul also admit received the name from Gomer as Cimmerians, also have their origin from the Gauls, and are read to have spread their first warlike movements into Europe. Diodorus, Appian, & Valerius Maximus have noted that the Cimbri are Gauls.

Legitimate secondary occupation.

10. If there is any legitimate right in the secondary occupation acquired by arms, which the whole world uses now, the Gauls have a right to the whole of Europe, subdued by them under Belovesus and Sigovesus, long before the Romans. Livy, Diodorus, Pausanias.

The Gallic aborigines.

11. The Gauls, whose eloquence taught the Britons (and never, despite whatever the malevolent genius against Gaul may have taken care to write), are therefore deservedly read in Ammianus Marcellinus and Timagenes to have had the name of Aborigines with their Umbrian pupils. Whence, when the race of the Gauls came into Italy from Armenia through the holy Syria under the leader Janus, as Cato is witness,
Britons formed by the Gauls.

and from there scattered from Gaul into all of Europe,