Ramiro I rämē´rō [key], d. 1063, first king of Aragón (1035–63), illegitimate son of Sancho III of Navarre, from whom he inherited Aragón. After the death of his half-brother Gonzalo he annexed Sobrarbe and Ribagorza and fought unsuccessfully against the Moorish king of Zaragoza. He died while fighting the Castilians at Graus and was succeeded by his son, Sancho I .
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