Islambol is just a myth about where the name came from but researches show that including the professors in my school say that name of istanbul came from Eis tin poliwhich means to the city in greekthe galata quarterwhich is right at the north of the historic peninsula has always been the largest residential area specially for the greek inhabitants of the city because the historic peninsula was reserved for the sultan Thats why the old istanbul was a passage way to the city which turned into istanbul in hundreds of yearsAlso there is no documents about the city being called islambol throughout the history