From BiblePortal Wikipedia

Diogenes [1]

(1) A saint in Macedonia, commemorated April 6.

(2) A presbyter of Alexandria in the 4th century, said to have been personally maltreated by Basil of Ancyra.

(3) A liberal friend of Chrysostom in his exile, A.D. 404.

(4) A bishop of Seleucobelus, in Syria, who attended the council at Ephesus, A.D. 431.

(5) A digamist bishop ordained by Alexander of Antioch.

(6) A bishop of Cyzicus (A.D. 449-451), present at the councils of Ephesus and Chalcedon.