(Ὤκελλος, Ὤκυλλος), or OCYLLUS, a Lacedaemonian, was one of the three ambassadors who happened to be at Athens when Sphodrias invaded Attica, in B. C. 378. They were apprehended as having been privy to his design, but were released on their pointing out the groundlessness of the suspicion, and on their assurances that the Spartan government would be found to look with disapproval on the attempt of Sphodrias. In B. C. 369, we find Ocellus again at Athens, as one of the ambassadors who were negotiating an alliance between the Athenians and Spartans against Thebes. (Xen. Hell. 5.4. §§ 22, &c., 6.5. §§ 33, &c.; comp. Diod. 15.29, 63 ; Plut. Pel. 14.)