A new linguistic study is reopening one of Europe’s oldest scholarly debates: whether the ancient Iberian language and Basque (Euskara) share a common origin. By moving beyond surface-level similarities and into the internal structure of inscriptions, the research argues that the parallels between the two languages are systematic, deep, and difficult to dismiss as coincidence.
A renewed look at an old mystery
For centuries, linguists have struggled to explain where Basque came from. Spoken today in parts of northern Spain and southwestern France, it stands apart from Indo-European languages, with no clear relatives. That isolation has long made it one of Europe’s great linguistic enigmas.
Now, a study led by Eduardo Orduña Aznar of the University of Barcelona suggests that Basque may be more closely linked to the ancient Iberian language than most modern scholars have been willing to accept.
Crucially, Orduña’s work does not rely on broad speculation or romantic notions of prehistoric continuity. Instead, it applies epigraphy, historical linguistics, and contextual textual analysis to Iberian inscriptions—texts that were long thought to offer little hope of genetic comparison.
From speculation to evidence
The idea of a Basque–Iberian connection is not new. As early as the 16th century, historians proposed that the peoples of pre-Roman Iberia might have shared a linguistic heritage. In the 19th century, Wilhelm von Humboldt famously argued for such a link, drawing heavily on place names.
That enthusiasm collapsed in the 20th century. Once the Iberian script was deciphered, scholars realized that Basque could not simply “translate” Iberian texts. The theory fell out of favor, often dismissed as unscientific.
What distinguishes Orduña’s approach is restraint. Rather than claiming direct mutual intelligibility, he argues for a remote genetic relationship, detectable only through stable and conservative elements of language.
Numbers that refuse to be ignored
The modern revival of the debate began with numerals. In the early 2000s, Iberian number words were convincingly identified, and their resemblance to Basque proved striking—not only in sound, but in structure.
Iberian words for one, two, four, five, and twenty align closely with their Basque equivalents. Even more telling is how these numbers combine. The Iberian expression for “twenty-five” follows the same additive logic as Basque—literally “twenty and five.” These forms appear in practical contexts such as weights and measures, leaving little room for metaphor or ambiguity.
Because numerals are among the most conservative elements of any language, this convergence has been widely regarded as the strongest evidence yet for a historical link.
Beyond counting: family and belonging
In his latest study, Orduña asks a harder question: if Iberian and Basque are related, should traces appear beyond numbers?
He turns to kinship terms and personal designations—words tied to family, belonging, and social structure. These are culturally central and typically resistant to borrowing.
By examining repeated elements in Iberian inscriptions, particularly funerary and dedicatory texts, Orduña identifies sequences that behave unlike personal names. They recur, combine with one another, and form recognizable patterns. When compared with Basque and ancient Aquitanian forms, several of these elements align with words meaning “father,” “son,” “relative,” or “member of a group.”
What matters is not any single match, but the pattern. As with numerals, these kinship-related elements form a distinct semantic subsystem within Iberian inscriptions.
Grammar tells the same story
Lexical parallels alone are never enough. Orduña therefore examines morphology and grammar, where borrowing is far less likely.
Iberian appears to use a possessive suffix comparable to the Basque genitive, and another marker that may function similarly to Basque ergative case marking—an unusual grammatical feature in Europe. Verbal forms also raise eyebrows. Iberian words possibly meaning “made” closely resemble the Basque verb for “to make,” suggesting shared verbal roots rather than chance resemblance.
Recent archaeological discoveries reinforce this picture. A Vasconic inscription written in an adapted Iberian script found in northern Iberia, includes a verb form that closely mirrors archaic Basque usage and resembles Iberian verbal constructions seen elsewhere.
A cautious conclusion, not a bold claim
Orduña is explicit about the limits of his argument. Iberian remains only partially understood, and some proposed correspondences remain debated. The study does not claim that Basque is simply “Iberian under a new name.”
Instead, it argues something narrower—and more difficult to dismiss: that exclusive, repeated, and structurally coherent parallels link the two languages across numerals, kinship terms, morphology, and verbal systems.
Taken together, these parallels point not to coincidence, but to shared inheritance deep in the linguistic prehistory of the Iberian Peninsula. Piece by piece, the long-standing puzzle of Basque origins may be moving toward a clearer—and more grounded—solution.
Orduña Aznar, E. (2026). The relationship between Basque and Iberian: Beyond the numerals. Palaeohispanica, 25(1) (Actas del XV Coloquio de Lenguas y Culturas Paleohispánicas). https://ifc-ojs.es/index.php/palaeohispanica/en/article/view/690
Cover Image Credit: Irulegi’s hand and his inscription. Public Domain – Wikimedia Commons