a native of Iberia, especially in ancient times.
Its original inhabitants were Iberians and Celts who were later conquered by the Romans and the Moors.
the extinct Romance language spoken in the Iberian peninsula in late classical times. It forms an intermediate stage between Latin and modern Spanish, Catalan, and Portuguese.
After all, no one calls Polish Polish Slavonic or Portuguese Portuguese Iberian .
the extinct Celtic language spoken in the Iberian peninsula in ancient times, known only from a few inscriptions, place names, and references by Latin authors.