The story
- Latin · derived fromGallī Trānspadānī
- Latin · derived fromGallia Trānspadāna
- English todayTranspadane Gaul
As a proper noun, a calque of the Latin Gallia Trānspadāna; the common noun is probably a regularly formed demonym from the proper noun, although it is likely that its formation was prompted by the Latin Gallī Trānspadānī.
Etymology from Wiktionary, CC BY-SA 4.0.