 The renaming of Constantinople to Istanbul probably is derived from "Stanbul" the Russian & Turk (foreigner-shortened) words of (Κωνσταντινούπολη) pronounced "ConStantinoupoli".Also, the Turks could not properly pronounce words beginning with two constants and beginning with "s" without adding an "i" in front.Thus for the Turks Stanbul became Istanbul, similarly Izmir for Smyrne (Σμύρνη) etc.