Caspian Sea and Persian gulf

It is about 6 months that there is an objection in Iran against what National Geography magazine did and in their atlas added “Arabic Gulf” in bracket where they wrote Persian Gulf. There was a great protest against it especially between bloggers. Iranian government also protest formally. But wonderful that the international name of Caspian is changed to “Khazar”? It is really strange coz Caspian came from “ cas” or “caspi’ nation that live in northern parts of Iran and still at that area people who have green or blue eyes named “ Cas” and now they are a part of Gilak nation in the area (Gilan& Mazandaran and Golestan provinces also possibly in neighbourhood). But according to Historical records “Khazar” is name of a nation belongs to yellow races that were living in northern parts of Caspian sea that is extincted at the moment.