The Romani people, also referred to as the Roma, are an Indo-Aryan ethnic group that primarily lives in Europe. They may have migrated north from present-day Rajasthan to present-day Punjab around 250 BC. They may also have come from the modern state of Sindh and Pakistan. Their subsequent westward migration out of South Asia is believed to have occurred in waves, beginning in the 5th century. It has been suggested that a wave of emigration from India may have taken place during the raids by Mahmud of Ghazni. As these soldiers were defeated, they were moved west with their families into the Byzantine Empire.
The author Ralph Lilley Turner has theorised a central Indian origin of the Romani, followed by a migration to northwest India, as the Romani language shares a number of ancient isoglosses with Central Indo-Aryan languages in relation to realization of some sounds of Old Indo-Aryan. This is lent further credence by its sharing exactly the same pattern of northwestern languages such as Kashmiri and Shina through the adoption of oblique enclitic pronouns as person markers. The overall morphology suggests that Romani participated in some of the significant developments leading toward the emergence of New Indo-Aryan languages, thus indicating that the proto-Romani did not leave the Indian subcontinent until late in the second half of the first millennium.