Teispes in Wikipedia
Teispes (from Greek Τεΐσπης < Old Persian: 𐎨𐎡𐏁𐎱𐎡𐏁 Cišpiš) lived from 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 after being freed from Median supremacy, and expanded his small kingdom. His kingdom was an Elamite vassal state. He was succeeded by his second son, Cyrus I.
Etymology of the name
Schmitt suggests that the name is probably Iranian, but its etymology is unknown. Its connection with either the name of the Mitannian and Araratian storm god Tešup-Theispas, or with the (Elamite) byname Za-iš-pi-iš-ši-ya is likely.