What is "teispes"

Teïspes (from Greek ; in Cišpiš) ruled Anshan in 675–640 BCE. He was the son of Achaemenes 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.