King Cyrus the Great, added to by his son Cambyses, and consolidated by Darius the Great.
Cyrus the Great, also called Cyrus II, was a son of Cambyses I. Mandana of Media, Queen consort of Cambyses I of Anshan, was his mother.
Darius I (the Great), who married Cyrus the Great's daughter Atossa.
Cyrus the second (great) was but not Cyrus the first
Cyrus the Great was succeeded by Darius the Great.
Xerxes mother was Atossa, Darius I of Persia wife and Cyrus the Greats' daughter.
His son Cambyses II.
Cyrus the Great, then his son Cambyses, then Darius.
Cambyses II was emperor of the Achaemenid Empire. He was son of Cyrus the Great.
The raised the Persians from being subsidiary to the Medes into an empire stretching through the Middle East to Central Asia.
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Cyrus the Great was the founder and first king of Achaemenid Persia. Darius was the son-in-law of Cyrus and was the third king of the Persian Achaemenid Empire, ruling the empire at it's greatest.