CT

Abbreviation of Constanța, A county of Romania.


Cluj

Cluj (accusative indefinite nominative)
Clujul (accusative definite nominative)
Cluj (indefinite)
Clujului (definite)
Clujule (vocative)

Compare the Hungarian name for the town, Hungarian Kolozsvár (cp.vár), and the German Klausenburg (cp. Burg). Alternative forms in older Romanian include Cluș.
May be derived from a Slavic diminutive of Nicholas, compare Czech Mikluš, ultimately from Ancient Greek Νικόλαος (Nikólaos).
Alternately, may be derived from Latin clausa, clusa, from clausus or clusus through an intermediate; compare the medieval Latin name for the town, Castrum Clus. See also Proto-Slavic *kľũčь (“key”).
The official name of the city is Cluj-Napoca, with the name of the Roman settlement Napoca added in 1974, but this form is rarely used outside of official contexts.


Alba

Alba (accusative indefinite nominative)
Albaua (accusative definite nominative)
Albale (indefinite)
Albalei (definite)
Alba (vocative)

From alba, definite feminine form of alb.


Roman

Roman (accusative indefinite nominative)
Romanul (accusative definite nominative)
Roman (indefinite)
Romanului (definite)
Romanule (vocative)


Arad

Arad (accusative indefinite nominative)
Aradul (accusative definite nominative)
Arad (indefinite)
Aradului (definite)
Aradule (vocative)

Borrowed from Hungarian Arad, its first ispán.


Olt

Oltului (dative genitive)
Olt (accusative indefinite nominative)
Oltul (accusative definite nominative)
Olt (indefinite)
Oltului (definite)
Oltule (vocative)

Uncertain. The name has been used since the ancient times, but the phonetic change a > o appears to indicate that the word reached Romanian through a Slavic intermediary (similar to the change from acetum to oțet). Direct inheritance from Latin would have yielded *Arută.
Ancient recorded variants include: Ancient Greek Aλoύτα (Aloúta) (Strabo), Ancient Greek Aλoύταζ (Aloútaz) (Ptolemaios), Latin Alutus (Tabula Peutingeriana).


Iași

Uncertain. Probably from Kipchak yaasi (“archers”), from yaa (“bow”), from Proto-Turkic *yā(y) (“bow”).
Early in the 20th century, a link to the ancient Iazyges has been proposed, the Roman name of an ancient Sarmatian tribe that once lived in the area, or from a tribe of Alans known as the Jassi.


Brașov

Brașov (accusative indefinite nominative)
Brașovul (accusative definite nominative)
Brașov (indefinite)
Brașovului (definite)
Brașovule (vocative)

Borrowed from Old Church Slavonic *Брашовъ (*Brašovŭ), from Брашо (Brašo) + -овъ (-ovŭ), diminutive from Братиславъ (Bratislavŭ). Compare the Hungarian name for the city, Hungarian Brassó, from the same source.
An alternative has been proposed from a Turkic barasu, meaning "white water" with a Slavic suffix -ov.
The city was known as Kronstadt ("Crown City") in the local Transylvanian Saxon (German) language, and Corona (“crown”) in Medieval Latin.

bor+

Brașov (a county in Transylvania, in central Romania)


Mureș

Uncertain. Either from a substratum language or from a Slavic language or from Hungarian Maros. The o > u sound change is common in Romanian before liquids in borrowings; compare олѣи (olěi) to ulei.
The river was known as Marisus in Latin during antiquity, and mentioned by Herodotus around 484 B.C. as Maris, possibly of Dacian origin, and in the 10th century as "Morisis". It is known as Maros in Hungarian and Mieresch in German.


Constanța

Constanța (accusative indefinite nominative)
Constanțaua (accusative definite nominative)
Constanțale (indefinite)
Constanțalei (definite)
Constanța (vocative)

Originally known as Tomis in antiquity, the city was later renamed Constantiana after Flavia Julia Constantia, sister of the Roman emperor Constantine the Great; it was first attested as Constantia, or Κωνστάντια (Kōnstántia) around the mid 10th century.


Hunedoara

Borrowed from Hungarian Hunyadvár, from Hunyad + vár (“fortress”).


Maramureș

Maramureș (accusative indefinite nominative)
Maramureșul (accusative definite nominative)
Maramureș (indefinite)
Maramureșului (definite)
Maramureșule (vocative)


Buzău

Buzău (accusative indefinite nominative)
Buzăul (accusative definite nominative)
Buzău (indefinite)
Buzăului (definite)
Buzăule (vocative)

Uncertain. Its name may be derived from Hungarian *Bozó, from Old Church Slavonic *Бъзовъ (*Bŭzovŭ, “[river] of the elderberries”), from бъзъ (bŭzŭ, “elderberry”). However,
the Slavic name might be an adaptation via folk etymology of earlier Ancient Greek Μουσεος (Mouseos), from a Paleo-Balkan language.


Prahova

From Old Church Slavonic *прахова (*praxova), from прахъ (praxŭ, “dust”) + -ова (-ova, feminine possessive suffix). The county name is derived from the river.


Dâmbovița

Borrowed from Old Church Slavonic *дѫбовица (*dǫbovica, “[river] of the oak trees”), from дѫбъ (dǫbŭ, “oak”) + -овъ (-ovŭ, possessive suffix) + -ица (-ica, deadjectival suffix), from Proto-Slavic *dǫbъ + *-ovъ + *-ica.

bor+

Dâmbovița (a county in southern Romania)


Sibiu

Sibiu (accusative indefinite nominative)
Sibiul (accusative definite nominative)
Sibiu (indefinite)
Sibiului (definite)
Sibiule (vocative)

From earlier from Sibiiu, borrowed from Old Church Slavonic Сибинъ (Sibinŭ).


Satu Mare

From older Sătmar, from Hungarian Szatmár, reinterpreted as satul mare (“the great village”).


Botoșani

Botoșani (accusative indefinite nominative)
Botoșaniul (accusative definite nominative)
Botoșani (indefinite)
Botoșaniului (definite)
Botoșaniule (vocative)


Suceava

Borrowed from Hungarian Szűcsvár, derived from szűcs (“furrier”) + vár (“fortress”).


Bălți

From bălți, plural of baltă (“pond, puddle”).


Teleorman

Of Cuman origin, derived from Kipchak teli (“mad”) + orman (“forest”). Doublet of Deliorman, from Ottoman Turkish.


Dolj

From older Doljiu, derived from Old Church Slavonic [Term?], from долъ (dolŭ, “valley”) + Жилъ (Žilŭ, “Jiu river”), from Proto-Slavic *dolъ (“valley”). Compare Gorj ("mountain Jiu").


Covasna

Covasnă (accusative indefinite nominative)
Covasna (accusative definite nominative)
Covasne (indefinite)
Covasnei (definite)
Covasnă (vocative)
Covasno (vocative)

Borrowed from Hungarian Kovászna, derived from Proto-Slavic *kvasьna, from *kvasъ, referring to the taste of the mineral waters in the region.


Gorj

From older Gorjiu, derived from Old Church Slavonic [Term?], from гора (gora, “mountain”) + Жилъ (Žilŭ, “Jiu river”), from Proto-Slavic *gora (“mountain”). Compare Dolj ("valley Jiu").


Bihor

Bihor (accusative indefinite nominative)
Bihorul (accusative definite nominative)
Bihor (indefinite)
Bihorului (definite)
Bihorule (vocative)

Borrowed from Serbo-Croatian vihor (“whirlwind”), from Proto-Slavic *vixъrъ (“whirlwind”). Compare vifor.


Ilfov

Ilfov (accusative indefinite nominative)
Ilfovul (accusative definite nominative)
Ilfov (indefinite)
Ilfovului (definite)
Ilfovule (vocative)

Borrowed from Old Church Slavonic ельховъ (elĭxovŭ), from ельха (elĭxa) + -овъ (-ovŭ), from Proto-Slavic *elьxa (“alder”). Compare Bulgarian Елхово (Elhovo).


Ialomița

Borrowed from Old Church Slavonic ꙗловица (jalovica, “[river] of the barren land”), from ꙗловъ (jalovŭ, “barren”) + -ица (-ica), from Proto-Slavic *jalovъ (“barren”) + *-ica (deadjectival suffix).


Putna

Borrowed from Ukrainian Путьна (Putʹna), from путь (putʹ) + -на (-na), from Proto-Slavic *pǫtь (“path, road”).


Vlașca

Borrowed from Bulgarian Влашка (Vlaška, “Wallachia”), from Bulgarian влах (vlah, “Vlach”), from Proto-Slavic *volxъ (“Romance speaker”).


Vâlcea

Vâlcea (accusative indefinite nominative)
Vâlceaua (accusative definite nominative)
Vâlcele (indefinite)
Vâlcelei (definite)
Vâlcea (vocative)

Uncertain. There is a Romanian word vâlcea (“small valley”), however, its stress is on the last syllable, unlike Vâlcea, which has its stress on the first syllable, making it unlikely to be derived from it.
An alternative is a derivation from a Slavic word *vьlkъ (“wolf”), as the 1247 Diploma of the Joannites of king Béla IV of Hungary mentions in the area a knez named Farkas (“wolf”), which could just be a translation of the name of the knez's name into Hungarian.

Vâlcea (a county of Oltenia, in southern Romania)


Tulcea

Borrowing from Turkish Tulça, from tul (“height, length”) + -ça.


Călărași

Călărașii (accusative indefinite nominative)
Călărașiii (accusative definite nominative)
Călărașii (indefinite)
Călărașiilor (definite)
Călărașiilor (vocative)


Covurlui

Borrowed from Kipchak *qovurluy, from Pecheneg *qoyurluy, from qoyur (“small”) + -luy (“river suffix”). Compare Romanian Cuhurlui, a lagoon in Ukraine.


Dorohoi

Borrowed from Ukrainian *Дорогуний (*Dorohunyj), from Дорогун (Dorohun).


Bacău

Bacău (accusative indefinite nominative)
Bacăul (accusative definite nominative)
Bacău (indefinite)
Bacăului (definite)
Bacăule (vocative)

Borrowed from Hungarian bakó (“executioner”).


Tecuci

Tecuci (accusative indefinite nominative)
Tecuciul (accusative definite nominative)
Tecuci (indefinite)
Tecuciului (definite)
Tecuciule (vocative)

Borrowed from Bulgarian тека (teka, “to flow”), compare Russian текучий (tekučij, “flowing”).


Giurgiu

Inherited from Latin Geōrgius, from Ancient Greek Γεώργιος (Geṓrgios). Compare Italian Giorgio. Doublet of George and Gheorghe.


Lăpușna

Borrowed from Old Church Slavonic лопушьна (lopušĭna), from лопухъ (lopuxŭ, “burdock”), from Proto-Slavic *lopuxъ.


Mehedinți

Borrowed from Serbo-Croatian Mehedinec, from Mehadia + -ec (demonym suffix).


Sălaj

Borrowed from Hungarian Szilágy, from szil (“elm”) + ágy (“river bank”). Doublet of Silaghi, which is a surname.


Neamț

From neamț (“German”), from Old Church Slavonic нѣмьць (němĭcĭ), from Proto-Slavic *němьcь.


Argeș

Argeș (accusative indefinite nominative)
Argeșul (accusative definite nominative)
Argeș (indefinite)
Argeșului (definite)
Argeșule (vocative)

Probably from Kipchak argis (“height”). An etymological link to the ancient names (Ordesos, Ὀρδησσός (Ordēssós)) is possible, but unlikely.


Vrancea

Vrancea (accusative indefinite nominative)
Vranceaua (accusative definite nominative)
Vrancele (indefinite)
Vrancelei (definite)
Vrancea (vocative)

Probably from Old Church Slavonic *враньць (*vranĭcĭ), from вранъ (vranŭ, “raven”) + -ьць (-ĭcĭ).


Timiș

Ultimately from Latin Tibiscus, of possible Thracian or Dacian origin.


Fălciu

Borrowed from Ukrainian Фалчий (Falčyj), from Фалчинь (Falčynʹ) + -ий (-yj).


Rădăuți

Borrowed from Ukrainian Радовці (Radovci), from Радо (Rado) + -овці (-ovci).


Brăila

Brăila (accusative indefinite nominative)
Brăilaua (accusative definite nominative)
Brăilale (indefinite)
Brăilalei (definite)
Brăila (vocative)


Orhei

Borrowed from Hungarian Őrhely, from őr (“guard”) + hely (“place”).


Odorhei

Borrowed from Hungarian Udvarhely, from udvarhely (“courtyard place”).


Târnava Mică

From Târnava + mic (“small”), from Old Church Slavonic трьнава (trĭnava), feminine of трьнавъ (trĭnavŭ), from трьнъ (trĭnŭ, “thorn”) + -авъ (-avŭ), from Proto-Slavic *tьrnъ (“thorn”).


Tutova

Borrowed from Ukrainian Тутова (Tutova), from тут (tut, “mulberry”) + -ова (-ova), from Turkic, from Persian توت (tut).


Târnava Mare

From Târnava + mare (“big”), from Old Church Slavonic трьнава (trĭnava), feminine of трьнавъ (trĭnavŭ), from трьнъ (trĭnŭ, “thorn”) + -авъ (-avŭ), from Proto-Slavic *tьrnъ (“thorn”).


Vaslui

Vaslui (accusative indefinite nominative)
Vasluiul (accusative definite nominative)
Vaslui (indefinite)
Vasluiului (definite)
Vasluiule (vocative)

Unknown. Due to the -ui ending, it has been proposed to be of Kipchak [Term?] origin.