A diaspora ( dy-ASP-ər-ə) is a population that is scattered across regions which are separate from its geographic place of origin. The word is used in reference to people who identify with a specific geographic location, but currently reside elsewhere.
Notable diasporic populations include the Jewish diaspora formed after the Babylonian exile; Assyrian–Chaldean–Syriac diaspora following the Assyrian genocide; Greeks that fled or were displaced following the fall of Constantinople and the later Greek genocide as well as the Istanbul pogroms; the emigration of Anglo-Saxons (primarily to the Byzantine Empire) after the Norman Conquest of England; the southern Chinese and Indians who left their homelands during the 19th and 20th centuries; the Irish diaspora after the Great Famine; the Scottish diaspora that developed on a large scale after the Highland and Lowland Clearances; Romani from the Indian subcontinent; the Italian diaspora and the Mexican diaspora; Circassians in the aftermath of the Circassian genocide; the Palestinian diaspora due to the Israeli–Palestinian conflict; the Armenian diaspora following the Armenian genocide; the Lebanese diaspora due to the Lebanese civil war; and Syrians due to the Syrian civil war; The Iranian diaspora, which grew from half a million to 3.8 million between the 1979 revolution and 2019, mostly live in United States, Canada and Turkey.
According to a 2019 United Nations report, the Indian diaspora is the world's largest diaspora, with a population of 17.5 million, followed by the Mexican diaspora, with a population of 11.8 million, and the Chinese diaspora, with a population of 10.7 million.
I give the link to this online article, and at least initially, I make no comment. Much varied information.
https://www.everyculture.com/multi/A-Br/Basque-Americans.html