Urbian or Urian is a possible Old European or Pre-Indo-European

Proto-Indo-European language

The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

 (Pre-IE) language defined by Sorin Paliga. The Proto-Indo-European

Proto-Indo-European language

The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

 (Proto-IE) language, the descendants of which have replaced the Pre-IE language(s), ought not to include a root corresponding to Latin urbs, as the Proto-IE were nomadic or semi-nomadic (in the Kurgan

Kurgan

Kurgan is the Turkic term for a tumulus; mound of earth and stones raised over a grave or graves, originating with its use in Soviet archaeology, now widely used for tumuli in the context of Eastern European and Central Asian archaeology....

 model and most reconstructions of IE society from the roots). Therefore, a reconstructed *OR/UR- or *OL/UL-, "huge, big, elevated", used also to refer to an urban settlement, may well be the root of a cross-cultural repertory of words, such as Latin

Latin

Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 urbs, "city", Thracian

Thracian language

The Thracian language was the Indo-European language spoken in ancient times in Southeastern Europe by the Thracians, the northern neighbors of the Ancient Greeks. The Thracian language exhibits satemization: it either belonged to the Satem group of Indo-European languages or it was strongly...

 Az-oros, Basque

Basque language

Basque is the ancestral language of the Basque people, who inhabit the Basque Country, a region spanning an area in northeastern Spain and southwestern France. It is spoken by 25.7% of Basques in all territories...

 uri, hiri "township", Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

 lab-yr-inthos

Labyrinth

In Greek mythology, the Labyrinth was an elaborate structure designed and built by the legendary artificer Daedalus for King Minos of Crete at Knossos...

and Sumerian

Sumerian language

Sumerian is the language of ancient Sumer, which was spoken in southern Mesopotamia since at least the 4th millennium BC. During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism...

 Urbillum today the city of Irbil

Arbil

Arbil / Hewlêr is the fourth largest city in Iraq after Baghdad, Basra and Mosul...

 in Iraq

Iraq

Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

.

On the other hand, many mainstream historical linguists, such as J.P. Mallory, are skeptical of alleged linguistic connections based on allegedly common individual roots rather than systematic sound change

Sound change

Sound change includes any processes of language change that affect pronunciation or sound system structures...

patterns that demonstrate similar shifts across a range of words.