Former names: Asitane, Dersaadet, Estambul, Konstantiniye, Konstantinopyla, Kospoli, Kostan, Kushta, Kushtandina or Payitaht (Payitaht simply means "Capital City", taht meaning "throne"; Turkish variants during Ottoman period), Beasantian or Baile Chòiseam (Scottish Gaelic), an Bhiosáint or Cathair Chonstaintín (Irish), Bysans or Byzantion or Konstantinopel (Swedish), Bysants or Konstantinopel (Norwegian), Bizanc or Carigrad or Konstantinopel (Slovene), Bizánc or Konstantinápoly (Hungarian), Bizanci or Constantinoble (Catalan), Bizancio or Constantinopla (Spanish), Bizâncio or Constantinopla (Portuguese), Biżanzju or Kostantinopli (Maltese), Bizancjum or Carogród or Konstantynopol (Polish), Bizans or Qüstəntiniyyə (Azeri), Bizant, Carigrad or Konstantinopol (Croatian), Bizanţ, Constantinopol, Constantinopole, Stambul or Ţarigrad (Romanian), Bisanzio or Costantinopoli (Italian),Byzance or Constantinople or Stamboul (French), Byzantion or Cařihrad or Konstantinopol (Czech), Byzantium or Constantinopolis (Latin), Byzantium * or Constantinople* (English), Byzanz or Byzantion or Konstantinopel (German), Caergystennin (Welsh), Caregrad – Царегра́д, Carjgrad – Царьгра́д, Carjgorod – Царьгород, Vizantij – Виза́нтий or Konstantinopolj – Константино́поль (Russian), Carigrad or Konstantinopolj or Stambol (Serbian), Carihrad or Konštantínopol (Slovak), Constantinopel (Dutch), Konseutantinopolliseu or K'onsŭt'ant'inop'ollisŭ – 콘스탄티노폴리스 (Korean), Konstantinobolis (Armenian), Konstantínópel (Icelandic), Konstantinopla (Tagalog), Konstantinopoli (Finnish), Konsutantinōpuru – コンスタンティノープル (Japanese), Miklagård (old Swedish), Mikligarðr (Old Norse), Qushta – קושטא/איסטנבול (Hebrew), Vizántion – Βυζάντιον or Konstantinoupoli – Κωνσταντινούπολη (Greek), 拜占庭 or 君士坦丁堡 (Chinese).
before 1946:
Königsberg (German , Hungarian ), Kunnegsgarbs, Twangste (Old Prussian), Karaliaučius (Lithuanian), Karaliaučios (Samogitian), Kēnigsberga, Karaļauči (Latvian), Keunigsbarg (Low Saxon), Koningsbergen (Dutch), Královec (Czech), Królewiec (Polish), Karalaviec - Каралявец (Belarusian), Kionigsberg Кёнигсберг (Russian), Kenigsberg - קעניגסבערג (Yiddish), Kēnihisuberuku - ケーニヒスベルク (Japanese), Kēnísībǎo - 柯尼斯堡 (Chinese), Kenixvérghi - Καινιξβέργη (Greek), Konigsberga (Portuguese), Regiomontium (Latin)