Kefken Island

Kefken Island (Turkish: Kefken Adası), lies off the Black Sea coast of Turkey, a short boat ride from the mainland village of Cebeci in the Kandıra district of Kocaeli Province.

[1] The last of these names is derived from ancient Greek Thynos (Θύνος)=Tuna fish, and perhaps from the Thynii, a tribe of Thracian origin that lived in coastal Bithynia.

[2] It is mentioned by the geographer Ptolemy (5.14.1) and Pliny the Elder (5.32),[3] and by Strabo,[4] and also in the Periplus of the Euxine Sea.

[4] The first of the Notitiae Episcopatuum in which it appears, always under the name "Daphnusia", is the early 10th-century one attributed to Byzantine Emperor Leo VI the Wise.

[4][8] No longer a residential bishopric, Daphnusia is today listed by the Catholic Church as a titular see.