The Jews of Europe were the main victims of the Holocaust in what the Nazis called the "Final Solution of the Jewish Question". The commonly used figure for the number of Jewish victims is six million, so much so that the phrase "six million" is now almost universally interpreted as referring to the Jewish victims of the Holocaust, though estimates by historians using, among other sources, records from the Nazi regime itself, range from five million to seven million.
About 220,000 Sinti and Roma were killed in the Holocaust (some estimates are as high as 800,000), between a quarter to a half of the European population. Other groups deemed "racially inferior" or "undesirable", Soviet military prisoners of war including Russians and other Slavs, Poles, the mentally or physically disabled, homosexuals, Jehovah's Witnesses, Communists and political dissidents and criminals, were also persecuted and killed. Many scholars do not include the Nazi persecution of all of these groups in the definition of the Holocaust, with some scholars limiting the Holocaust to the genocide of the Jews; some to genocide of the Jews, Roma, and disabled; and some to all groups targeted by Nazi racism.[2] Taking all these other groups into account, however, the total death toll rises considerably, estimates generally place the total number of Holocaust victims at 9 to 11 million, though some estimates have been as high as 26 million.
The word holocaust originally derived from the Greek word holokauston,