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  Diaspora -

Diaspora: The word "diaspora" is derived from the Greek verb speiro (to sow) and the preposition dia (over). When applied to humans, the ancient Greeks thought of diaspora as migration and colonization. By contrast, for Jews, Africans, Palestinians and Armenians the expression acquired a more sinister and brutal meaning. Diaspora signified a collective trauma, a banishment, where one dreamed of home but lived in exile.
Other peoples abroad who have also maintained strong identities have, in recent years, defined themselves as diasporas, though they were neither active agents of colonization nor passive victims of persecution.

All diasporic communities settled outside their natal (or imagined natal) territories, acknowledge that "the old country"--a notion often buried deep in language, religion, custom or folklore--always has some claim on their loyalty and emotion.  (Robert Cohen ix).
 

• Five kinds of Diaspora: Victim (e.g. Jews, Africans, Armenians), Labour (Indian, Chinese), Trade (Chinese and Lebanese), Imperial (the British), Cultural diasporas (the Caribbean).  (See also Diaspora)

Stories of Diaspora: the hybrids (in Chinese)

Reference:
Cohen, Robert.  Global Diaspora: An Introduction.  Seattle: U of Washington P, 1997.