#Romanian geography

• Apahida — A large locality and its homonymous commune located in Cluj County, within the historical region of Transylvania, positioned in the metropolitan area of Cluj-Napoca on the Someșul Mic River. The territory is a highly important regional railway and road junction and is archaeologically renowned for the discovery of early medieval treasures of inestimable value belonging to the Migration Period.
• Apața — A large locality and its homonymous commune located in Brașov County, within the historical region of Transylvania, Romania. Positioned in the contact zone between the Brașov Depression and the Baraolt Mountains on the banks of the Olt River, the settlement has a long history, being culturally recognized for preserving multiethnic traditions and as the birthplace of the humanist philosopher János Apáczai Csere.
• Apateu — A large locality and its homonymous commune located in Arad County, within the historical region of Crișana, Romania. The territory is positioned in the Crișurilor Plain and is administratively and economically recognized as a traditional rural settlement primarily focused on agricultural activities, vegetable farming, and livestock breeding.
• Arius — A geographical proper name borne by settlements or watercourses in the Romanian territory, most notably the Ariușd village in Covasna county, archaeologically renowned for the Neolithic site belonging to the Cucuteni-Ariușd culture. In regional language, the term can also represent a hypocoristic derivative or a local archaic variant used to describe a small landform or a brook.
• Armeanca — A geographical designation (toponym) or hydrological name (hydronym) borne by various small watercourses, valleys, or micro-regions within Romania; a proper family name used in the Romanian language space, holding a strong historical connection to the presence and influence of Armenian communities in local trade and social life over the centuries.
• Armenești — A geographical proper name borne by several settlements and microtoponyms in the Romanian territory, most notably Armenești village in Vâlcea county, as well as streets or historical quarters in major cities (such as the famous Armenian Quarter in Bucharest). These names historically and culturally reflect the early settlement, commercial influence, or presence of old Armenian ethnic communities and places of worship within those respective geographical perimeters.
• Arseanca — A regional geographical name within the Romanian area, often used to identify small watercourses or rural microtoponyms historically associated with thermal phenomena, controlled burning of vegetation for agricultural purposes, or settlements near burnt areas. Linguistically, the term represents a variant or derivation from the past participle root 'ars' of the verb 'a arde', integrated into local onomastics through the suffixation specific to descriptive place names.
• Arsineasa — A regional Romanian toponym or hydronym, identifying a landform (valley, hill, glade) or a small watercourse, whose archaic name is structurally derived from the root of the noun 'arsă' or adjective 'ars' (burned), historically associated with forest fires for expanding pastures or areas affected by severe droughts. This name is preserved in the memory of mountain and sub-Carpathian rural communities, reflecting ancient agrarian practices of clearing land through fire.
• Arsu — A Romanian toponym and surname directly derived from the adjective or past participle 'ars' (burnt). As a place name, it designates specific microtoponyms (hills, streams, or valleys) historically associated with forest fires, land clearing through fire for expanding pastures, or arid, calcareous soils heavily dried by the sun. As a surname, it reflects an archaic nickname linked to a physical trait or the bearer's place of origin.
• Arsul — The articulated variant of the toponym 'Arsu', specifically used to designate a particular geographical feature, such as the Arsul Peak or the Arsul stream. The definite article '-ul' emphasizes the uniqueness of the place within the respective community, indicating a prominent landform, a forest partially burnt in the past, or a watercourse that partially dries up during periods of intense heat.
• Asunel brook — A rare geographic and toponymic designation referring to a small watercourse, a brook, or a local microtoponymy associated with a rural settlement or landform within the Romanian territory. In the historical linguistic structure, it represents a hypocoristic diminutive form derived from ancient hydronymic or anthronymic roots.
• Aușeu — The name of a commune and its homonymous residential village in Bihor County, Crișana, Romania, situated on the upper course of the Crișul Repede River. The locality is historically attested since the Middle Ages and is recognized today for its picturesque hilly geographic landscape at the contact with the Pădurea Craiului Mountains, as well as for its rail and road transport infrastructure crossing the gorge.