Cambyses I (flourished 6th century BC), Persian king of the Achaemenid dynasty who ruled (circa 600-559 BC) over Anshan (now Baghdad Province, Iraq) as a vassal of the Medes, then preeminent in Persia.
Cambyses I was the son of Cyrus I (flourished 7th century BC), whom he succeeded, and the father of Cyrus the Great, who founded the Persian Empire. According to the Greek historian Herodotus, Cambyses I married the daughter of Astyages, king of the Medes (reigned about 584-550 BC).
Source: "Cambyses I," Microsoft(R) Encarta(R) 98 Encyclopedia. (c) 1993-1997 Microsoft Corporation. All rights reserved.[LOBS1.FTW]