Variant of the famous Castilian surname Carrion. Descendants of the knight Alonso Carreno who distinguished himself in the reconquest of the village of Carrion de los Condes by way of Trojan Horse tactic.
Carreon is also a variant of the Basque name Carrion (see) from "arro"-- Brushwood--and the suffix of abundance "on" and the prothetic C, documented in Segura, Guipuzcoe in 1374.
Carreon is also a name which first arose during the Medieval period in Normandy. It is derived from when the family having lived at Cairon in Calvados, which was in Normandy.