Cydippe was the mother of Cleobis and Biton. Cydippe, a priestess of Hera, was on her way to a festival in the goddess' honor. The oxen which were to pull her cart were overdue and her sons, Biton and Cleobis pulled the cart the entire way (45 stadia; 8 km). Cydippe was impressed with their devotion to her and asked Hera to give her children the best gift a god could give a person. Hera had the two brothers drop dead instantaneously as the best thing she could give them was for them to die at their moment of highest devotion. This is Herodotus's account (Histories 1.31) of the story and it comes couched as advice from Solon the Athenian to Croesus as to who the most blessed people in history are. The most oft used quotation from this episode is (roughly translated) "call no man blessed until he is dead."
Cydippe or Cyrbia was the daughter of Hegetoria and Ochimus. She married Ochimus' brother, Cercaphus, who inherited the island. According to an alternate version, Ochimus engaged Cydippe to Ocridion but Cercaphus loved her and kidnapped her. He did not return until Ochimus was old.