The Machvaya (also Machavaya) are a group of Romany originating specifically from Serbia. They are seen by some to be an offshoot of the Kalderash and by others to be set apart from them. Natural Romany migration coupled with the war in the Balkans has meant there are an increased number of Machvaya living in other countries, specifically where there are an increased number of Serbs. Tucson, Arizona and Hamilton, Ontario both house large numbers of Machvaya as do the USA, Canada and Britain as a whole.