What is "artabanus"

Artabanus may refer to various rulers/monarchs of ancient Persia & Parthia:

• Artabanus, son of Hystaspes, brother of Darius I, and uncle of Xerxes I.
• Artabanus of Persia, a Hyrcanian by birth, commander of Xerxes' guard, and Xerxes' assassin (465 BC)
• Artapanus, general under Xerxes I (486–465 BC)
• King Arsaces II of Parthia c. 211–191 BC, called Artabanus by some early scholars
• Artabanus II (of Parthia) c. 127–124 BC
• Artabanus III (of Parthia) c. AD 10–38
• Artabanus IV (of Parthia) c. 80–81
• Artabanus V (of Parthia) c. 216–224
• Artabanus, one of the sons of Artabanus III who was killed with his family in 40

There is some confusion over the numbering of these rulers: scholars who give Arsaces II the name "Artabanus I" add one to the regnal number of his successors, thus counting up to Artabanus V.