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Last name Delion (Delion ) , worldwide, is quite a rare family name. The last name Delion is habitual in France, where it is quite a rare surname, Guatemala, and the Democratic Republic of the Congo, where it is a rare surname. Measured by absolute frequency, it is commonest in France, the Democratic Republic of the Congo, and Nigeria. Very seldom, Delion is the forename as well as the last name.