Arnaut

Arnaut () is an Albanian ethnonym used to denote Albanians. "Arvanid" (), "Arnavud" (), plural: "Arnavudlar" (): modern Turkish: Arnavut, plural: "Arnavutlar"; are ethnoyms used mainly by Ottoman and contemporary Turks for Albanians with "Arnavutça" being called the Albanian language.
Etymology.
The original Greek ethnonym Άλβανίτης (approx. "Álbanítis"), derived from Άλβάνος ("Álbános"), became Άρβανίτης "Árvanítis" in Modern Greek. The pronunciation of "β" changed from /b/ in ancient Greek to /v/ in Byzantine Greek. This is reflected in the Turkish term, "Arnavut" or "Arnaut", by ways of metathesis (-van- to -nav-). A related Greek term is "Arvanites".
The Ottoman Turks borrowed their name for Albanians after hearing it from the Byzantine Greeks.
Usage.
Ethnic marker.
During the Ottoman era, the name was used for ethnic Albanians regardless of their religious affiliations, just like it is today.
In the late eighteenth and early nineteenth centuries, due to socio-political disturbances by some Albanians in the Balkans, the term was used as an ethnic marker for Albanians in addition to the usual millet religious terminology to identify people in Ottoman state records. While the term used in Ottoman sources for the country was "Arnavudluk" (آرناوودلق) for areas such as Albania, Western Macedonia, Southern Serbia, Kosovo, parts of northern Greece and southern Montenegro. In modern Turkish "Arnavutluk" refers only to the Republic of Albania.
Transfer to other languages.
The term "Arnā'ūṭ" (الأرناؤوط) also entered the Arabic language as an exonym for Albanian communities that settled in the Levant during the Ottoman era onward, especially for those residing in Syria. The term "Arnaut" (Арнаут), plural: "Arnauti" (Арнаути) has also been borrowed into Balkan South Slavic languages like Bulgarian and within Serbian the term has also acquired pejorative connotations regarding Albanians.
In Ukraine, Albanians who lived in Budzhak and who later also settled in the Azov Littoral of Zaporizhia Oblast are also known as "Arnaut". The city of Odessa has two streets: "Great Arnaut Street" and "Little Arnaut Street".
Albanian Ottoman soldiers.
Historically used as an exonym, the Turkish term "Arnaut" has also been used for instance by some Western Europeans as a synonym for Albanians that were employed as soldiers in the Ottoman army. In Romanian "arnăut" was used in a similar way, since at least the eighteenth century, for Albanian mercenaries dressed in traditional garb and hired either by the rulers of the Romanian principalities for their court guards, or by the boyars as bodyguards.