Gallʹia Braccaʹta [trousered Gaul].
Gallia Narbonen’sis was so called from the “braccæ” or trousers which the natives wore in common with the Scythians and Persians.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.