1550s (n.) "native or inhabitant of Moravia;" 1610s (adj.) "of or pertaining to Moravia or its people," from Moravia. From 1746, in reference to the Protestant sect (United Brethren) founded by Count Zinzendorf in the former German state of Moravia. It traces its origin to John Huss. Related: Moravianism.
1825 in reference to Moravian protestants; 1869 in reference to the dispersion of the Jews; from Greek diaspora "dispersion," from diaspeirein "to scatter about, disperse," from dia "about, across" (see dia-) + speirein "to scatter" (see sparse). The Greek word was used in Septuagint in Deuteronomy xxviii.25. A Hebrew word for it is galuth "exile." The earlier word for it in English was Latinate dispersion (late 14c.). Related: Diasporic.