3. An advocate in the courts of the praefecti praetoriorum at Constantinople, was one of the commission of sixteen, headed by Tribonian, who were employed by Justinian (A. D. 530-533) to compile the Digest. (Const. Tunta, § 9, Const. Δέδωκεν, § 9.) He is a different person from the Joannes who was at the head of the commission appointed to compile the first Constitutionum Codex.
A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890