Cyrus I (Old Persian: "Kuruš") or Cyrus I of Anshan or Cyrus I of Persia, was King of Anshan in Persia from  600 to 580 BC or, according to others, from  652 to 600 BC.
 He should not be confused with his famous grandson Cyrus the Great, also known as Cyrus II.
 His name in Modern Persian is کوروش, "Kurosh", while in Greek he was called Κῦρος, "Kȳros".
The Cyrus Cylinder (Persian: "Ostovane-ye Kurosh" ; استوانه کوروش‎ ‎ ) or Cyrus Charter (Persian: "Manshūre Kūrosh" ; منشور کوروش‎ ‎ ) is an ancient clay cylinder, now broken into several pieces, on which is written a declaration in Akkadian cuneiform script in the name of Persia's Achaemenid king Cyrus the Great.
 It dates from the 6th century BC and was discovered in the ruins of Babylon in Mesopotamia (modern Iraq) in 1879.
 It is currently in the possession of the British Museum, which sponsored the expedition that discovered the cylinder.
 It was created and used as a foundation deposit following the Persian conquest of Babylon in 539 BC, when the Neo-Babylonian Empire was invaded by Cyrus and incorporated into his Persian Empire.
Arsames (Old Persian: 𐎠𐎼𐏁𐎠𐎶 Aršāma, <a href="Persian%20language">modern Persian</a>: آرشام‎ Arshām, <a href="Greek%20language">Greek Ἀρσάμης ; – ca.
 520 BC) was the son of Ariaramnes and perhaps briefly the king of Persia during the Achaemenid dynasty, but gave up the throne and declared loyalty to Cyrus II of Persia.
 After this, Arsames most likely retired to his family estate in the Persian heartland of Parsa, and lived out the rest of his long years there peacefully, though he may nominally have exercised the duties of a "lesser king" under the authority of the "Great King".
 In an inscription allegedly found in Hamadan he is called "king of Persia", but some scholars believe it is a fraud, either modern or ancient.
 Another attestation of his reign is the Behistun Inscription, where his grandson Darius I lists him among his royal forebears and counts him among the eight kings who preceded him.
Cyrus is the given name of a number of Persian kings.
 Most notably it refers to Cyrus the Great.
 Cyrus is also the name of Cyrus I of Anshan (ca. 650 BC), King of Persia the grandfather of Cyrus the Great; and Cyrus the Younger (died 401 BC), brother to the Persian King Artaxerxes II of Persia.
Cyrus II of Persia (Old Persian: 𐎤𐎢𐎽𐎢𐏁 "Kūruš"; <a href="New%20Persian">New Persian</a>: کوروش "Kuruš"; <a href="Hebrew">Hebrew</a>: כֹּרֶשׁ "Koresh"; <a href="Circa">c.</a> 600 – 530 BC), commonly known as Cyrus the Great  and also called Cyrus the Elder by the Greeks, was the founder of the <a href="Achaemenid%20Empire">Achaemenid Empire</a>.
 Under his rule, the empire embraced all the previous civilized states of the ancient Near East, expanded vastly and eventually conquered most of Southwest Asia and much of Central Asia and the Caucasus.
 From the Mediterranean Sea and Hellespont in the west to the Indus River in the east, Cyrus the Great created the largest empire the world had yet seen.
 Under his successors, the empire eventually stretched at its maximum extent from parts of the Balkans (Bulgaria-Paeonia and Thrace-Macedonia) and Eastern Europe proper in the west, to the Indus Valley in the east.
 His regal titles in full were The Great King, King of Persia, King of Anshan, King of Media, King of Babylon, King of Sumer and Akkad, and King of the Four Corners of the World.
Teïspes (from Greek Τεΐσπης ; in Old Persian: 𐎨𐎡𐏁𐎱𐎡𐏁 "Cišpiš") ruled <a href="Anshan%20%28Persia%29">Anshann 675–640 BCE.
 He was the son of Achaemenes of Persis and an ancestor of Cyrus the Great.
 There is evidence that Cyrus I and Ariaramnes were both his sons.
 Cyrus I is the grandfather of Cyrus the Great, whereas Ariaramnes is great grandfather of Darius the Great.
 According to 7th-century BC documents, he captured the Elamite city of Anshan, speculated to have occurred after the Persians were freed from Median supremacy, and expanded his small kingdom.
 His kingdom was, however, a vassal state of the Neo Assyrian Empire (911–605 BCE).
 He was succeeded by his second son, Cyrus I.
Derbices or Derbikes (Persian: دربیک‌ها‎ ‎ ) were a small pocket of tribal people located at or around Hyrcania, which is an area located in the northern borders of the Iranian Plateau.
 Most of what history can recount of this tribe is from the writings of Ctesias.
 Led by their leader, Amoraeus, Derbices led a rebellion against Cyrus the Great causing the mortal wounding of the king.
 They are however eventually defeated by Cyrus and incorporated into the Persian Empire.
 It is critical to note that the account of Derbices is basically the work of Ctesias and offers one of the plausible versions by which Cyrus the Great is killed.
 Other plausible accounts include that of Herodotus which revolves around the Massagatae, and various other versions including one by Xenophon which states Cyrus the Great actually died peacefully at his palace.
 Regardless, this article (and Derbices by association) makes sense in the context of historical reportings of Ctesias, which according to at least a few historians is the most credible version (along with that of Herodotus) since "...he [Cteias] had been a long while in Persia as a doctor."
The Battle of Opis, fought in September 539 BC, was a major engagement between the armies of Persia under Cyrus the Great and the Neo-Babylonian Empire under Nabonidus during the Persian invasion of Mesopotamia.
 At the time, Babylonia was the last major power in western Asia that was not yet under Persian control.
 The battle was fought in or near the strategic riverside city of Opis, north of the capital Babylon.
 It resulted in a decisive victory for the Persians.
 A few days later, the city of Sippar surrendered to the Persians and Cyrus's forces entered Babylon apparently without a fight.
 Cyrus was subsequently proclaimed king of Babylonia and its subject territories, thus ending the independence of Babylon and incorporating the Babylonian Empire into the greater Persian Empire.
Cambyses I or Cambyses the Elder (via Latin from Greek Καμβύσης , from Old Persian "Kambūǰiya-"; Elamite: "Kanbuziya" , Akkadian: "Kambuziya" , Aramaic "Knbwzy"; c. 600 BC – 559 BC ) was king of Anshan from c. 580 to 559 BC and the father of Cyrus the Great (Cyrus II), younger son of Cyrus I, and brother of Arukku.
 He should not be confused with his better-known grandson Cambyses II.
Oebares was a Persian officer of Cyrus (fl.
 c. 5th century BC).
 When Cyrus sent Petisaces to bring Astyages to court from his satrapy, Oebares caused Petisaces to leave the old king Astyages to die in the desert, when this was discovered he proceeded to starve himself to death to avoid falling to an act of vengeance from Astyages' daughter.

Question: Oebares was a Persian officer of Cyrus II of Persia, commonly known as Cyrus the Great  and also called Cyrus the Elder by the Greeks, was the founder of which Empire?
Answer: menid Empi