stylistic:tone, structural:reformatting, quality:correction, linguistic:paraphrasing
Etymology

The name Wallachia is an exonym, generally not used by Romanians themselves, who used the denomination "Țara Românească" – Romanian Country or Romanian Land, although it does appear in some Romanian texts as Valahia or Vlahia. It derives from the term walhaz used by Germanic peoples and Early Slavs to refer to Romans and other speakers of foreign languages. In Northwestern Europe, this gave rise to Wales, Cornwall, and Wallonia, among others, while in Southeast Europe it was used to designate Romance -speakers, and subsequently shepherds in general.

In Slavonic texts of the Early Middle Ages, the name Zemli Ungro-Vlahiskoi (Земли Унгро-Влахискои or "Hungaro-Wallachian Land") was also used as a designation for the region. The term, translated in Romanian as "Ungrovalahia", remained in use up to the modern era in a religious context, referring to the Romanian Orthodox Metropolitan seat of Hungaro-Wallachia, in contrast to Thessalian or Great Vlachia in Greece or Small Wallachia (Mala Vlaška) in Serbia. The Romanian-language designations of the state were Muntenia (The Land of Mountains), Țara Rumânească (the Romanian Land), Valahia, and, rarely, România. The spelling variant Țara Românească was adopted in official documents by the mid-19th century; however, the version with u remained common in local dialects until much later.

For long periods after the 14th century, Wallachia was referred to as Vlashko (Bulgarian: Влашко) by Bulgarian sources, Vlaška (Serbian: Влашка) by Serbian sources, Voloschyna (Ukrainian: Волощина) by Ukrainian sources, and Walachei or Walachey by German -speaking (most notably Transylvanian Saxon) sources. The traditional Hungarian name for Wallachia is Havasalföld, literally "Snowy lowlands", the older form of which is Havaselve, meaning "Land beyond the snowy mountains" ("snowy mountains" refers to the Southern Carpathians (the Transylvanian Alps)); its translation into Latin, Transalpina was used in the official royal documents of the Kingdom of Hungary. In Ottoman Turkish, the term Eflâk Prensliği, or simply Eflâk افلاق, appears. (Note that in a turn of linguistic luck utterly in favor of the Wallachians' eastward posterity, this toponym, at least according to the phonotactics of modern Turkish, is homophonous with another word, افلاك, meaning "heavens" or "skies".). In old Albanian, the name was " Gogënia ", which was used to denote non-Albanian speakers.

Arabic chronicles from the 13th century had used the name of Wallachia instead of Bulgaria. They gave the coordinates of Wallachia and specified that Wallachia was named al-Awalak and the dwellers ulaqut or ulagh.

The area of Oltenia in Wallachia was also known in Turkish as Kara-Eflak ("Black Wallachia") and Kuçuk-Eflak ("Little Wallachia"), while the former has also been used for Moldavia.