Cosmas III of Constantinople


 * A Coptic Orthodox patriarch has the same name, Pope Cosmas II of Alexandria (851–858), commemorated in the Coptic Synaxarion on the 21st day of Hathor.

Cosmas III (Κοσμᾶς; died 1736) was the Ecumenical Patriarch of Constantinople from 1714 to 1716. He also served as Greek Patriarch of Alexandria under the episcopal name Cosmas II from 1723 until his death in 1736.